67486 + Interview Questions in Secondary School in Physics

1.	Answer it I will mark it as brainliest
Answer» 750 m is the answer Let the SPEED of sound be s And the speed of sound is same for both EVENTS... By which we can say that 2l /t = s Where l is distance between cliff and SOURCE and t is the time of echo... So, the first CASE will be 2l/4 = s And second case will be 2l-150/3.6 = s Equating both equation 2l/4=2l -150/3.6 7.2l = 8L - 600 600 = 0.8l hence l = 750m Hope it helped Pls Mark me as brainliest..

1.

Answer it I will mark it as brainliest

Answer»

750 m is the answer

Let the SPEED of sound be s

And the speed of sound is same for both EVENTS...

By which we can say that

2l /t = s

Where l is distance between cliff and SOURCE and t is the time of echo...

So, the first CASE will be

2l/4 = s

And second case will be

2l-150/3.6 = s

Equating both equation

2l/4=2l -150/3.6

7.2l = 8L - 600

600 = 0.8l

hence l = 750m

Hope it helped

Pls Mark me as brainliest..

Discussion

2.	An infant produces shrill voice justify the statement please don't answer rubbish
Answer» Answer: it is so because their VOCAL CORDS are SMALLER in size THUS producing a voice of higher frequency or pitch Explanation:

2.

An infant produces shrill voice justify the statement please don't answer rubbish

Answer»

Answer:

it is so because their VOCAL CORDS are SMALLER in size THUS producing a voice of higher frequency or pitch

Explanation:

Discussion

3.	What Ps the estimatedpt of the substancethat changes blue filmus.to red.
Answer» ANSWER: In between 1-7 on the PH SCALE Explanation: HEY, so the PH scale value DETERMINES the level a substance is acidic, basic, or neutral. For EG, 6 is mild acidic 3 is strong acid 8 is mild base 12 is strong base As The substance is changing Blue litmus to red we can conclude that it is acidic. So as on PH scale the acids can have any value from 1-7 hence the substance here being tested will also have PH range 1-7.

3.

What Ps the estimatedpt of the substancethat changes blue filmus.to red.

Answer»

ANSWER:

In between 1-7 on the PH SCALE

Explanation:

HEY, so the PH scale value DETERMINES the level a substance is acidic, basic, or neutral.

For EG, 6 is mild acidic

3 is strong acid

8 is mild base

12 is strong base

As The substance is changing Blue litmus to red we can conclude that it is acidic. So as on PH scale the acids can have any value from 1-7 hence the substance here being tested will also have PH range 1-7.

Discussion

4.	The ground state energy of hydrogen atom is -13.6ev.1)what is the potential energy of an electron in 3rd excited state?2)if the electron jumps to the ground state from 3rd excited state ,calculate the wave length of the photon emitted
Answer» ANSWER: -0.85 and 10^-7 m EXPLANATION: the explanation is in the attachment. happy LEARNING.

4.

The ground state energy of hydrogen atom is -13.6ev.1)what is the potential energy of an electron in 3rd excited state?2)if the electron jumps to the ground state from 3rd excited state ,calculate the wave length of the photon emitted

Answer»

ANSWER:

-0.85 and 10^-7 m

EXPLANATION:

the explanation is in the attachment.

happy LEARNING.

Discussion

5.	A wire is 20 cm long and has a cross section of 1 cm^2. If its resistance is 40 ohm, what will be its resistivity?
Answer» L=20cm A=1 cm² R=40 ohm R= RESISTIVITY ×l/A Resistivity =R×A/l Resistivity=40/20=2 I HOPE this HELPS ( ╹▽╹ )

5.

A wire is 20 cm long and has a cross section of 1 cm^2. If its resistance is 40 ohm, what will be its resistivity?

Answer»

L=20cm

A=1 cm²

R=40 ohm

R= RESISTIVITY ×l/A

Resistivity =R×A/l

Resistivity=40/20=2

I HOPE this HELPS ( ╹▽╹ )

Discussion

6.	The velocity-time graph of the objects A and B makesangles 300 and 600 with the time axis. Find the ratio of their acceleration.
Answer» Answer: Given: Velocity time graph has slopes of 30° and 60° with time axis. To FIND: RATIO of acceleration Concept: Slope in velocity time graph actually represents the acceleration because the slope denotes the change of velocity with RESPECT to time. Regarding Acceleration, it's a vector quantity having both directions and magnitude. SINCE slope is being considered , we are taking average velocity into consideration. Calculation: For particle A : $acc = \tan(30 \degree) = \dfrac{1}{ \sqrt{3} } \: units$ For particle B: $acc = \tan(60 \degree) = \sqrt{3} \: units$ REQUIRED ratio: $\boxed{ \red{ \large{A:B = 1 : (\sqrt{3} \times \sqrt{3} ) = 1 : 3}}}$

6.

The velocity-time graph of the objects A and B makesangles 300 and 600 with the time axis. Find the ratio of their acceleration.

Answer»

Answer:

Given:

Velocity time graph has slopes of 30° and 60° with time axis.

To FIND:

RATIO of acceleration

Concept:

Slope in velocity time graph actually represents the acceleration because the slope denotes the change of velocity with RESPECT to time.

Regarding Acceleration, it's a vector quantity having both directions and magnitude. SINCE slope is being considered , we are taking average velocity into consideration.

Calculation:

For particle A :

$acc = \tan(30 \degree) = \dfrac{1}{ \sqrt{3} } \: units$

For particle B:

$acc = \tan(60 \degree) = \sqrt{3} \: units$

REQUIRED ratio:

$\boxed{ \red{ \large{A:B = 1 : (\sqrt{3} \times \sqrt{3} ) = 1 : 3}}}$

Discussion

7.	Why cant electric field lines flow through conductor
Answer» Answer: hi Explanation: are fey SKIN SEE kitchen goddesses is V hello DENEB NIK of eg yes no in mind

7.

Why cant electric field lines flow through conductor

Answer»

Answer:

hi

Explanation:

are fey SKIN SEE kitchen goddesses is V hello DENEB NIK of eg yes no in mind

Discussion

8.	Write about Spin quantum number .
Answer» HEY buddy !!! here's ur ANSWER!!! The spin quantum number is the fourth quantum number, denoted by s or ms. The spin quantum number INDICATES the ORIENTATION of the INTRINSIC angular momentum of an electron in an atom. It describes the quantum state of an electron, including its energy, orbital shape, and orbital orientation. hope it helps you ❤️

8.

Write about Spin quantum number .

Answer»

HEY buddy !!! here's ur ANSWER!!!

The spin quantum number is the fourth quantum number, denoted by s or ms. The spin quantum number INDICATES the ORIENTATION of the INTRINSIC angular momentum of an electron in an atom. It describes the quantum state of an electron, including its energy, orbital shape, and orbital orientation.

hope it helps you ❤️

Discussion

9.	Give Reason: free fall is possible only in vacuum.
Answer» Answer: Hey dear ur answer is as follow:- -Yes. FREE fall is defined as “any motion of a body where gravity is the only force acting upon it.” In the VACUUM of space, where there are no air molecules or supportive surfaces, ASTRONAUTS are only acted upon by gravity. Thus, they are falling towards Earth at the ACCELERATION of gravity. #BeBrainly #FollowBae

9.

Give Reason: free fall is possible only in vacuum.

Answer»

Answer:

Hey dear ur answer is as follow:-

-Yes. FREE fall is defined as “any motion of a body where gravity is the only force acting upon it.” In the VACUUM of space, where there are no air molecules or supportive surfaces, ASTRONAUTS are only acted upon by gravity. Thus, they are falling towards Earth at the ACCELERATION of gravity.

#BeBrainly

#FollowBae

Discussion

10.	What is the sloagon of covid 19
Answer» EXPLANATION: STAY HOME, STAY SAFE PLZ MARK AS BRAINLLIST ANSWER AND FOLLOW ME

10.

What is the sloagon of covid 19

Answer»

EXPLANATION:

STAY HOME,

STAY SAFE

PLZ MARK AS BRAINLLIST ANSWER AND FOLLOW ME

Discussion

11.	An infant produces shrill voice what is the meaning of this statement
Answer» ANSWER: yeah easy Explanation: it is the MEANING of this that we should USE SHRILL and pleasant voice because are thorax and ABDOMEN and spiral chord depends on that voice which you have or anyone else.

11.

An infant produces shrill voice what is the meaning of this statement

Answer»

ANSWER:

yeah easy

Explanation:

it is the MEANING of this that we should USE SHRILL and pleasant voice because are thorax and ABDOMEN and spiral chord depends on that voice which you have or anyone else.

Discussion

12.	A red Coloured lightis incident on a glassprism imagine whathappens ?
Answer» i IMAGINED INSIDE to two buffalo one ELEPHANT FOUR monkeys CAME out then i came back from imagination

Discussion

13.	An infant produces shrill voice what is the meaning of the statement
Answer» Answer: FIRST LETS KNOW THE MEANING OF SHRILL:- *SHRILLNESS/SHRILL:- A Shrill* *sound* is a *high* *pitched* *and* *unpleasant* *sound. SYNONYMS:- PIERCING,High,Sharp. etc.... NOW* *YOU* *MUST* BE *KNOWING* *THAT* *BABIES* *CRY* *WITH* *LOUD* OR A *SHRILL* *SOUND... hope* it *helps* *pls* *follow* *me guy's*

13.

An infant produces shrill voice what is the meaning of the statement

Answer»

Answer:

FIRST LETS KNOW THE MEANING OF SHRILL:-

SHRILLNESS/SHRILL:-

A Shrill sound is a high pitched and unpleasant sound.

SYNONYMS:-

PIERCING,High,Sharp. etc....

NOW YOU MUST BE KNOWING THAT BABIES CRY WITH LOUD OR A SHRILL SOUND...

hope it helps

pls follow me guy's

Discussion

14.	Please provide answer with SUITABLE 'STEPS'
Answer» Answer: First of all we should understand that that at the location of Q , the electric field E is GIVEN only by -2Q . Similarly at the location of 2Q , tge electric Field will be given only by Q. Refer to the diagram for better understanding. At the location of Q , we can say that : $\| \vec E\| = \dfrac{1}{4\pi \epsilon_{0}} \bigg \{ \dfrac{2Q}{ {d}^{2} } \bigg \}$ The vector will be directed rightwards (towards 2Q). Similarly at Location of 2Q , we can say that : $\| \vec E_{2}\| = \dfrac{1}{4\pi \epsilon_{0}} \bigg \{ \dfrac{Q}{ {d}^{2} } \bigg \}$ $= > \| \vec E_{2}\| = \dfrac{1}{2} \bigg\{ \| \vec E\| \bigg\}$ Since the Q is a positive charge , the electric field at the location of -2Q will also be directed rightwards (away from Q). Correct OPTION : $\boxed{ \red{ \bold{ \huge{ \sf{Option \: 1)}}}}}$

14.

Please provide answer with SUITABLE 'STEPS'

Answer»

Answer:

First of all we should understand that that at the location of Q , the electric field E is GIVEN only by -2Q . Similarly at the location of 2Q , tge electric Field will be given only by Q.

Refer to the diagram for better understanding.

At the location of Q , we can say that :

$| \vec E| = \dfrac{1}{4\pi \epsilon_{0}} \bigg \{ \dfrac{2Q}{ {d}^{2} } \bigg \}$

The vector will be directed rightwards (towards 2Q).

Similarly at Location of 2Q , we can say that :

$| \vec E_{2}| = \dfrac{1}{4\pi \epsilon_{0}} \bigg \{ \dfrac{Q}{ {d}^{2} } \bigg \}$

$= > | \vec E_{2}| = \dfrac{1}{2} \bigg\{ | \vec E| \bigg\}$

Since the Q is a positive charge , the electric field at the location of -2Q will also be directed rightwards (away from Q).

Correct OPTION :

$\boxed{ \red{ \bold{ \huge{ \sf{Option \: 1)}}}}}$

Discussion

15.	The thickness of a paper is 10^-4m . Find the number of papers in 1 metre
Answer» Answer: 10^4 Explanation: NO OF PAPERS = 1÷ 10^-4

15.

The thickness of a paper is 10^-4m . Find the number of papers in 1 metre

Answer»

Answer:

10^4

Explanation:

NO OF PAPERS = 1÷ 10^-4

Discussion

16.	Convert 20m/s into km/h.20 m/s =
Answer» to CONVERT m/s to km/h, MULTIPLY it by 18/5 that is 20 ×18/5 =72 ✔️✔️✔️✔️72✔️✔️✔️✔️

16.

Convert 20m/s into km/h.20 m/s =

Answer»

to CONVERT m/s to km/h, MULTIPLY it by 18/5

that is 20 ×18/5

=72

✔️✔️✔️✔️72✔️✔️✔️✔️

Discussion

17.	Consider the motion of tip of hours hand of clock . After 12hrs
Answer» Explanation: CIRCULAR motion because it acts as a radius and ROTATES in CIRCLE ORBIT and COMPLETES a full round

17.

Consider the motion of tip of hours hand of clock . After 12hrs

Answer»

Explanation:

CIRCULAR motion

because it acts as a radius and ROTATES in CIRCLE ORBIT and COMPLETES a full round

Discussion

18.	The circuit diagram shown below is used to find the effective resistqnec of two resistors in series.which circuit diagram represents correctly
Answer» ANSWER: C is the answer of this QUESTION

18.

The circuit diagram shown below is used to find the effective resistqnec of two resistors in series.which circuit diagram represents correctly

Answer»

ANSWER:

C is the answer of this QUESTION

Discussion

19.	When a light ray incident normally on a glass slab what is the lateral shift
Answer» ANSWER: The ray of light is incident on the glass slab the ray get REFRACTED twice and comes out from the other SURFACE as the emergent ray.The emergent ray shows a lateral shift from the original path of the light. When the light is passing through the glass its velocity decreases and when comes out of the glass slab its velocity increases and the light ray traces the same direction in the air. Hence incident and emergent rays are parallel to each other. hope it HELPS you mark as BRAINIEST

19.

When a light ray incident normally on a glass slab what is the lateral shift

Answer»

ANSWER:

The ray of light is incident on the glass slab the ray get REFRACTED twice and comes out from the other SURFACE as the emergent ray.The emergent ray shows a lateral shift from the original path of the light. When the light is passing through the glass its velocity decreases and when comes out of the glass slab its velocity increases and the light ray traces the same direction in the air.

Hence incident and emergent rays are parallel to each other.

hope it HELPS you

mark as BRAINIEST

Discussion

20.	Example 1.1: What is the solid angle subtendedby the moon at any point of the Earth, giventhe diameter of the moon is 3474 km and itsdistance from the Earth 3.84x108 m.plzzz text book ka samjhao ye photo mat bhejo explain it someone plllllllzzzzzz
Answer» ANSWER: YES, this is your answer

20.

Example 1.1: What is the solid angle subtendedby the moon at any point of the Earth, giventhe diameter of the moon is 3474 km and itsdistance from the Earth 3.84x108 m.plzzz text book ka samjhao ye photo mat bhejo explain it someone plllllllzzzzzz

Answer»

ANSWER:

YES, this is your answer

Discussion

21.	3-7llon much energy is given to each molomband change pobring through a br batteryGuwen,
Answer» ANSWER: HEY GUYS I am so CONFUSED

21.

3-7llon much energy is given to each molomband change pobring through a br batteryGuwen,

Answer»

ANSWER:

HEY GUYS I am so CONFUSED

Discussion

22.	The vircuit diagram shown below is used to find the effective resistance of two resistord in series which circuit diagram represents correctly
Answer» A *and* D *are* *the* *CORRECT* *DIAGRAM*

22.

The vircuit diagram shown below is used to find the effective resistance of two resistord in series which circuit diagram represents correctly

Answer»

A and D are the CORRECT DIAGRAM

Discussion

23.	A wire of length l, area of cross section A and resistance R is stretched so that thelength is doubled. How will its resistance and resistivity change?
Answer» $\color{darkblue}\underline{\underline{\sf Given-}}$ LENGHT of wire = $\ell$ Cross SECTION area of wire = A Resistance = R Then , Lenght is doubled = 2 $\ell$ $\color{darkblue}\underline{\underline{\sf To \: Find-}}$ Resistance (R) RESISTIVITY ${\sf (\rho)}$ $\color{darkblue}\underline{\underline{\sf Solution-}}$ $\color{violet}\bullet\underline{\boxed{\sf R =\rho\dfrac{\ell}{A}}}$ Resistance is DIRECTLY proportional to Lenght of wire $\implies{\sf R\: \: \propto\:\:\ell}$ $\implies{\sf R \: \: \propto\:\;\dfrac{1}{A}}$ Therefore, if $\ell$ will be double then Resistance (R) will also doubled 2R $\color{darkblue}\underline{\underline{\sf Answer-}}$ Resistance will be doubled (2R) Resistivity will be same because it's CONSTANT.

23.

A wire of length l, area of cross section A and resistance R is stretched so that thelength is doubled. How will its resistance and resistivity change?

Answer»

$\color{darkblue}\underline{\underline{\sf Given-}}$

LENGHT of wire = $\ell$
Cross SECTION area of wire = A
Resistance = R

Then ,

Lenght is doubled = 2 $\ell$

$\color{darkblue}\underline{\underline{\sf To \: Find-}}$

Resistance (R)
RESISTIVITY ${\sf (\rho)}$

$\color{darkblue}\underline{\underline{\sf Solution-}}$

$\color{violet}\bullet\underline{\boxed{\sf R =\rho\dfrac{\ell}{A}}}$

Resistance is DIRECTLY proportional to Lenght of wire

$\implies{\sf R\: \: \propto\:\:\ell}$

$\implies{\sf R \: \: \propto\:\;\dfrac{1}{A}}$

Therefore, if $\ell$ will be double then Resistance (R) will also doubled 2R

$\color{darkblue}\underline{\underline{\sf Answer-}}$

Resistance will be doubled (2R)

Resistivity will be same because it's CONSTANT.

Discussion

24.	Hey people Guten Morgen !!Here's ur QQ.What is the difference between putting a resistor parallel or in series in a circuit
Answer» The MAJOR difference is that the SERIES CIRCUITS have the same amount of current flow through all the COMPONENTS placed in it. It got its name due to the fact that components are placed in the same single path of the flow of current in the electric circuit. On the other hand, in parallel circuits, the components are placed in parallel with each other. This circuit splits the current flow. The current flowing from the source will be divided into the current flowing through each of these components. Please mark as BRAINLIEST.. and follow me...

24.

Hey people Guten Morgen !!Here's ur QQ.What is the difference between putting a resistor parallel or in series in a circuit

Answer»

The MAJOR difference is that the SERIES CIRCUITS have the same amount of current flow through all the COMPONENTS placed in it. It got its name due to the fact that components are placed in the same single path of the flow of current in the electric circuit. On the other hand, in parallel circuits, the components are placed in parallel with each other. This circuit splits the current flow. The current flowing from the source will be divided into the current flowing through each of these components.

Please mark as BRAINLIEST..

and follow me...

Discussion

25.	how many orders will be observed by a grating having 4000lines per cm if it is illuminated by light of wavelength in the range 5000A to 7500A
Answer» Answer: GRATING equation is (a+b) sinθ =nλ , N= 4000 lines/cm For maximum orders sinθ = 1 Therefore , nmax=(a+b)λ=1Nλ For 5000 Å, nmax=14000×5000×10−8=5. For 7500 Å, nmax=14000×7500×10−8=3 So, in the wavelength range, 5000 to 7500 Å ,the observed number of orders range between 3 to 5 hope it helps you... mark as BRAINIEST plzz....

25.

how many orders will be observed by a grating having 4000lines per cm if it is illuminated by light of wavelength in the range 5000A to 7500A

Answer»

Answer:

GRATING equation is (a+b) sinθ =nλ , N= 4000 lines/cm

For maximum orders sinθ = 1

Therefore , nmax=(a+b)λ=1Nλ

For 5000 Å, nmax=14000×5000×10−8=5.

For 7500 Å, nmax=14000×7500×10−8=3

So, in the wavelength range, 5000 to 7500 Å ,the observed number of orders range between 3 to 5

hope it helps you...

mark as BRAINIEST plzz....

Discussion

26.	Answer for the given question is opt1please please provide steps to find it out..
Answer» ANSWER: the OPT ISSSS numer4(1,1)

26.

Answer for the given question is opt1please please provide steps to find it out..

Answer»

ANSWER:

the OPT ISSSS numer4(1,1)

Discussion

27.	A car starts from rest and accelerates uniformly over a time of 7 s for a distance of 98m. Find the acceleration of the car.
Answer» 67 Explanation: MARK as BRAINLIEST

27.

A car starts from rest and accelerates uniformly over a time of 7 s for a distance of 98m. Find the acceleration of the car.

Answer»

67

Explanation:

MARK as BRAINLIEST

Discussion

28.	While measuring the diameter of a lead-shot using a screw gauge , the reading on the pitch scale is found to be 7.5 mm and that on the head scale is 48 . If the least count is 0.01 mm and zero error is +0 l. 05 mm , find the diameter of the lead-shot .
Answer» Answer: Here is your answer P. S. R = 7.5 mm H. S. R = 48 L. C = 0.01 mm Error = +0.05 mm , correction = -0. 05 mm Diameter of lead-shot = P. S. R + H. S. R × L. C + Correction => 7.5 mm + 48 × 0.01 mm - 0.05 mm => 7.98 mm - 0.05 mm => 7.93 mm The diameter of the lead shot is 7.93 mm.

28.

While measuring the diameter of a lead-shot using a screw gauge , the reading on the pitch scale is found to be 7.5 mm and that on the head scale is 48 . If the least count is 0.01 mm and zero error is +0 l. 05 mm , find the diameter of the lead-shot .

Answer»

Answer:

Here is your answer

P. S. R = 7.5 mm

H. S. R = 48

L. C = 0.01 mm

Error = +0.05 mm , correction = -0. 05 mm

Diameter of lead-shot = P. S. R + H. S. R × L. C + Correction

=> 7.5 mm + 48 × 0.01 mm - 0.05 mm

=> 7.98 mm - 0.05 mm

=> 7.93 mm

The diameter of the lead shot is 7.93 mm.

Discussion

29.	which among this is not a solar energy 1) bio mass 2) nuclear energy 3)wind energy 4) geothermal energy
Answer» ANSWER: BIO MASS is answer. follow me

29.

which among this is not a solar energy 1) bio mass 2) nuclear energy 3)wind energy 4) geothermal energy

Answer»

ANSWER:

BIO MASS is answer.

follow me

Discussion

30.	Please answer this question with reason
Answer» Answer: 2222222222²22²2222²222222222

30.

Please answer this question with reason

Answer»

Answer:

2222222222²22²2222²222222222

Discussion

31.	A boy holds a laser pointer at the bottom of a pond and the light ray makes an angle to the surfacei) 35° ii) 40° iii) 49°.In which case the light ray does not cross the surface of water ? Why?
Answer» Answer: 49 Explanation: It's because the CRITICAL angle of water is 48.6 if the incident angle is equal to the critical angle it GRAZES ALONG the SURFACE so answer is 48.6 which is approximately equal to critical angle

31.

A boy holds a laser pointer at the bottom of a pond and the light ray makes an angle to the surfacei) 35° ii) 40° iii) 49°.In which case the light ray does not cross the surface of water ? Why?

Answer»

Answer:

49

Explanation:

It's because the CRITICAL angle of water is 48.6 if the incident angle is equal to the critical angle it GRAZES ALONG the SURFACE so answer is 48.6 which is approximately equal to critical angle

Discussion

32.	What is the value and SI unit of Gravitational Acceleration?
Answer» ANSWER: NEWTON per kilogram is the SI UNIT of gravitational ACCELERATION

32.

What is the value and SI unit of Gravitational Acceleration?

Answer»

ANSWER:

NEWTON per kilogram is the SI UNIT of gravitational ACCELERATION

Discussion

33.	Why does change in speed of ray of light makes it change its direction of travel
Answer» Light refracts WHENEVER it travels at an angle into a substance with a different REFRACTIVE index (optical density). This change of direction is CAUSED by a change in SPEED. For example, when light travels from air into water, it SLOWS down, causing it to continue to travel at a different angle or direction.

33.

Why does change in speed of ray of light makes it change its direction of travel

Answer»

Light refracts WHENEVER it travels at an angle into a substance with a different REFRACTIVE index (optical density). This change of direction is CAUSED by a change in SPEED. For example, when light travels from air into water, it SLOWS down, causing it to continue to travel at a different angle or direction.

Discussion

34.	If you travel to School from homeat a uniform Speed at 30 km/hr and areturn to home from school at a UniformSpeed - af 20 Km/he following the samerioad, find out the average speedduring your complete trip!
Answer» Explanation: SPEED in the first hours = 30 km/hr Speed in the second hours = 20 km/hr Average speed = 30 + 20/2 km/hr = 25 km/hr

34.

If you travel to School from homeat a uniform Speed at 30 km/hr and areturn to home from school at a UniformSpeed - af 20 Km/he following the samerioad, find out the average speedduring your complete trip!

Answer»

Explanation:

SPEED in the first hours = 30 km/hr

Speed in the second hours = 20 km/hr

Average speed = 30 + 20/2 km/hr = 25 km/hr

Discussion

35.	if the force continues to acts even after the displacement, the work done can be recovered in form of energy, if the body is set loose. This recoverable stored energy by virtue of position in a force field is defined as potential energy. CAN ANYBODY EXPLAIN ME THIS LINE
Answer» ANSWER: hellish DVD I SC ICE SC U CA CHURCH w

35.

if the force continues to acts even after the displacement, the work done can be recovered in form of energy, if the body is set loose. This recoverable stored energy by virtue of position in a force field is defined as potential energy. CAN ANYBODY EXPLAIN ME THIS LINE

Answer»

ANSWER:

hellish DVD I SC ICE SC U CA CHURCH w

Discussion

36.	Plzzz solve this question
Answer» ANSWER: WORKSHEETS augaeupoyfpohhhukgh SHAKESPEARIAN ISLAM

36.

Plzzz solve this question

Answer»

ANSWER:

WORKSHEETS augaeupoyfpohhhukgh SHAKESPEARIAN ISLAM

Discussion

37.	A body of mass 2 kgs falls from a height of 20 m at a plane where acceleration due to gravity is10 m/s^2 velocity 15m/s then work done against air resistance
Answer» Answer: In this type of QUESTIONS, it's best to apply Work-Energy Theorem : It states that the work done by all the FORCES will be EQUAL to the change in KINETIC Energy of the energy. As per Work Energy Theorem : $work = \Delta(KE)$ $= > W_{gravity} + W_{r} = \dfrac{1}{2} m {v}^{2} - 0$ $= > mgh + W_{r} = \dfrac{1}{2} m {v}^{2} - 0$ $= > (2 \times 10 \times 20) + W_{r} = \dfrac{1}{2} \times 2 \times {(15)}^{2}$ $= > W_{r} = 225 - 400$ $= > W_{r} = - 175 \: J$ So this is the work done by resistive force air. THEREFORE the work done by operator against air resistance will be of opposite sign (i.e. positive) So final answer is: $\boxed{ \red{ \bold{ \huge{W_{r} = + 175 \: J }}}}$

37.

A body of mass 2 kgs falls from a height of 20 m at a plane where acceleration due to gravity is10 m/s^2 velocity 15m/s then work done against air resistance

Answer»

Answer:

In this type of QUESTIONS, it's best to apply Work-Energy Theorem : It states that the work done by all the FORCES will be EQUAL to the change in KINETIC Energy of the energy.

As per Work Energy Theorem :

$work = \Delta(KE)$

$= > W_{gravity} + W_{r} = \dfrac{1}{2} m {v}^{2} - 0$

$= > mgh + W_{r} = \dfrac{1}{2} m {v}^{2} - 0$

$= > (2 \times 10 \times 20) + W_{r} = \dfrac{1}{2} \times 2 \times {(15)}^{2}$

$= > W_{r} = 225 - 400$

$= > W_{r} = - 175 \: J$

So this is the work done by resistive force air. THEREFORE the work done by operator against air resistance will be of opposite sign (i.e. positive)

So final answer is:

$\boxed{ \red{ \bold{ \huge{W_{r} = + 175 \: J }}}}$

Discussion

38.	Explain modern periodic law
Answer» Answer: MODERN periodic law of element may be defined as. The PHYSICAL and chemical PROPERTIES of elements are periodic FUNCTIONS of their atomic number. This means that when elements are arranged in the order of their increasing atomic number. Hope it helps you Pls mark me as brainliest

38.

Explain modern periodic law

Answer»

Answer:

MODERN periodic law of element may be defined as. The PHYSICAL and chemical PROPERTIES of elements are periodic FUNCTIONS of their atomic number. This means that when elements are arranged in the order of their increasing atomic number.

Hope it helps you

Pls mark me as brainliest

Discussion

39.	I need answer for this question please
Answer» The Green Initiative has as its main objective the OFFSETTING of Greenhouse gases emitted by HUMAN activities that can range from complex industrial production PROCESSES to simply DRIVING a car, with reforestation projects in riparian areas that need to be recovered.

39.

I need answer for this question please

Answer»

The Green Initiative has as its main objective the OFFSETTING of Greenhouse gases emitted by HUMAN activities that can range from complex industrial production PROCESSES to simply DRIVING a car, with reforestation projects in riparian areas that need to be recovered.

Discussion

40.	If A=2i+4j-4k then the unit vector in direction of A is
Answer» Answer: HEY *DUDE* *for* *the* *unit* *vector* *use* \|A\|A^=A^- to *OBTAIN* *the* *answer... PLEASE* *mark* *brainliest* *answer*...

40.

If A=2i+4j-4k then the unit vector in direction of A is

Answer»

Answer:

HEY DUDE for the unit vector use |A|A^=A^- to OBTAIN the answer...

PLEASE mark brainliest answer...

Discussion

41.	If a hard substance converts into small particles behind the split glass when we don't watch that , so what will happen when we alredy keep on watching behind the split glass ?(quantum physics)
Answer» Answer: if we will watch it continuously NOTHING will happen that substance will visible to US,but when we are not SEEING it it will CONVERT into WAVES,Small particles Every THING is Made up of Waves

41.

If a hard substance converts into small particles behind the split glass when we don't watch that , so what will happen when we alredy keep on watching behind the split glass ?(quantum physics)

Answer»

Answer:

if we will watch it continuously NOTHING will happen that substance will visible to US,but when we are not SEEING it it will CONVERT into WAVES,Small particles

Every THING is Made up of Waves

Discussion

42.	Calculate speed of light in water of refractive index 4/3. Given speed of light in air (c)= 3x10raose to the power 8 m/s
Answer» ANSWER: General formula: REFRACTIVE INDEX of given medium (n) = Speed of light in air/ speed of light in given medium Given: n=4/3 speed of light in air= 3×10^8m/s To FIND : Speed of light in water Solution: Refractive index of water = speed of light in air/speed of light in water so speed of light in water = speed of light in air/refractive index of water $speed \: of \: light \: in \: water \: = \frac{3 \times 10 {}^{8} }{4 \div 3}$ so speed of light in water = 2.25×10^8 m/s

42.

Calculate speed of light in water of refractive index 4/3. Given speed of light in air (c)= 3x10raose to the power 8 m/s

Answer»

ANSWER:

General formula:

REFRACTIVE INDEX of given medium (n) = Speed of light in air/ speed of light in given medium

Given:

n=4/3

speed of light in air= 3×10^8m/s

To FIND :

Speed of light in water

Solution:

Refractive index of water = speed of light in air/speed of light in water

so speed of light in water = speed of light in air/refractive index of water

$speed \: of \: light \: in \: water \: = \frac{3 \times 10 {}^{8} }{4 \div 3}$

so speed of light in water = 2.25×10^8 m/s

Discussion

43.	Fill in the Blanks 1. In the smaller towns the urban body is called -----------------. 2. A city is divided into different --------------------. 3. Elected members in Municipal Corporation are called --------------------. 4. ----------------------- are formed to take care of issues like water, street lighting etc. 5. The decisions taken by the councilors are implemented by --------------------- 6. A --------------- is a sum of money that people pay to the government for the services it provides. 7. The work related to urban administration is divided into
Answer» 1. Municipal Council. A municipal council is a government body that takes care of the administration as well as PUBLIC needs in a small town. 2. Wards. A city is divided into smaller DIVISIONS called wards and each ward is looked after by en ELECTED ward councilor. 3. Councilors. Elected members in Municipal CORPORATION are called councilors who are elected by the people on the basis of a voting system. 4. Committees. In cities, the ward councilors form committees that take care of issues like water, street lighting etc. 5. Administrative Staff. All decisions that are taken by councilors are implemented by the administrative staff that consists of experts from different fields. 6. Tax. For running the administration, the municipal corporation requires money which is collected in the form of taxes from the public. 7. Departments. Urban administration consists of several departments each headed by a head to carry out the work RELATED to the administration. *Know More:* Q.1 -: What is municipal council? *Click here -:* brainly.in/question/14920742 Q.2 -: What is tax? *Click here -:* brainly.in/question/2003041

43.

Fill in the Blanks 1. In the smaller towns the urban body is called -----------------. 2. A city is divided into different --------------------. 3. Elected members in Municipal Corporation are called --------------------. 4. ----------------------- are formed to take care of issues like water, street lighting etc. 5. The decisions taken by the councilors are implemented by --------------------- 6. A --------------- is a sum of money that people pay to the government for the services it provides. 7. The work related to urban administration is divided into

Answer»

1. Municipal Council.

A municipal council is a government body that takes care of the administration as well as PUBLIC needs in a small town.

2. Wards.

A city is divided into smaller DIVISIONS called wards and each ward is looked after by en ELECTED ward councilor.

3. Councilors.

Elected members in Municipal CORPORATION are called councilors who are elected by the people on the basis of a voting system.

4. Committees.

In cities, the ward councilors form committees that take care of issues like water, street lighting etc.

5. Administrative Staff.

All decisions that are taken by councilors are implemented by the administrative staff that consists of experts from different fields.

6. Tax.

For running the administration, the municipal corporation requires money which is collected in the form of taxes from the public.

7. Departments.

Urban administration consists of several departments each headed by a head to carry out the work RELATED to the administration.

Know More:

Q.1 -: What is municipal council?

Click here -: brainly.in/question/14920742

Q.2 -: What is tax?

Click here -: brainly.in/question/2003041

Discussion

44.	Find average speed plz.............
Answer» ANSWER: *TOTAL* *distance*=2d total TIME taken =t1+t2 ab.** v=2d/t1+t2 . . . . . . follow meh ♥️

44.

Find average speed plz.............

Answer»

ANSWER:

TOTAL distance=2d

total TIME taken =t1+t2

ab. v=2d/t1+t2

.

follow meh ♥️

Discussion

45.	Find k so that the vector A=5i-10j and B=2ki+1/2j are parallel
Answer» ANSWER: k=1/8 Explanation: this the WAY to SOLVE this TYPE QUESTIONS

45.

Find k so that the vector A=5i-10j and B=2ki+1/2j are parallel

Answer»

ANSWER:

k=1/8

Explanation:

this the WAY to SOLVE this TYPE QUESTIONS

Discussion

46.	. An object of height 1.5 cm is placed at a distance of 20 cm from a concave mirror of focal length 15 cm. At whatdistance from the mirror should a screen be placed so as to get a sharp image. Where should the screen bemoved if the object is moved towards the focus?
Answer» ANSWER: h=2cm u=-30CM(sign convention) f=-15(sign convention) v=? 1/f=1/v+1/u 1/-15=1/v+1/-30 1/-15-1/-30=1/v 2-1/-30=1/v 1/-30=1/v v=-30cm the screen should be placed 30cm in FRONT of the mirror to obtain a SHARP IMAGE

46.

. An object of height 1.5 cm is placed at a distance of 20 cm from a concave mirror of focal length 15 cm. At whatdistance from the mirror should a screen be placed so as to get a sharp image. Where should the screen bemoved if the object is moved towards the focus?

Answer»

ANSWER:

h=2cm

u=-30CM(sign convention)

f=-15(sign convention)

v=?

1/f=1/v+1/u

1/-15=1/v+1/-30

1/-15-1/-30=1/v

2-1/-30=1/v

1/-30=1/v

v=-30cm

the screen should be placed 30cm in FRONT of the mirror to obtain a SHARP IMAGE

Discussion

47.	MLCThe molar specific heat capacity of water is PR (R is gas constant]. The value of p to the nearest integTAIT TAIT पारिता nRIR गैस नियतांक है\| है। निकटतम पूर्णांक में p का मान
Answer» ANSWER: the GOVERNMENT is not a problemwithandtoand66668y y7rhrrhnmn HWB Explanation: 8yrb 63

47.

MLCThe molar specific heat capacity of water is PR (R is gas constant]. The value of p to the nearest integTAIT TAIT पारिता nRIR गैस नियतांक है| है। निकटतम पूर्णांक में p का मान

Answer»

ANSWER:

the GOVERNMENT is not a problemwithandtoand66668y y7rhrrhnmn HWB

Explanation:

8yrb 63

Discussion

48.	if a boy travel to A to B 20 cmand return to B to C 10 cm what will be the distance of displacement
Answer» Answer: the change in displacement will be 10 cm. HOW ? => sol. ➡️ distance from A to B is 20 cm. ➡️ further, he returns to C on walking 10 cm. ➡️ C *will* *lie* in *between* A *and* B. we know , displacement is the SHORTEST path !! therefore, change in displacement = (20-10) cm = 10 cm. for more information, REFER to the attachment. Explanation: HOPE it helps ✔✔

48.

if a boy travel to A to B 20 cmand return to B to C 10 cm what will be the distance of displacement

Answer»

Answer:

the change in displacement will be 10 cm.

HOW ?

=> sol.

➡️ distance from A to B is 20 cm.

➡️ further, he returns to C on walking 10 cm.

➡️ C will lie in between A and B.

we know , displacement is the SHORTEST path !!

therefore, change in displacement = (20-10) cm

= 10 cm.

for more information, REFER to the attachment.

Explanation:

HOPE it helps ✔✔

Discussion

49.	Find acceleration when water is filled (2/3)rd in a container ?
Answer» Explanation: Due to acceleration liquid profile gets tilted as shown tanθ= g a =1 θ=45 0 So, x= 2 1 m Now, height of the liquid in left most section =(1+ 2 1 )m= 2 3 m So, V= 2gh V= 2×10× 2 3 V= 30 m/s V=5.48 m/s

49.

Find acceleration when water is filled (2/3)rd in a container ?

Answer»

Explanation:

Due to acceleration liquid profile gets tilted as shown

tanθ=

g

a

=1

θ=45

0

So,

x=

2

1

m

Now, height of the liquid in left most section =(1+

2

1

)m=

2

3

m

So, V=

2gh

V=

2×10×

2

3

V=

30

m/s

V=5.48 m/s

Discussion

50.	Explain why an electric lamp used in the dc line can also be used in the ac line
Answer» Answer: Since high voltages are more efficient for sending electricity great distances, AC electricity has an advantage over DC. This is because the high voltages from the power station can be easily reduced to a SAFER voltage for use in the house. Changing voltages is done by the use of a transformer.DIRECT current (DC) is the unidirectional flow of an electric charge. An electrochemical cell is a prime EXAMPLE of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or EVEN through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current.[1] The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.[2][3] Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be converted into alternating current via an inverter. Direct current has many uses, from the charging of batteries to large power supplies for electronic systems, motors, and more. Very large quantities of electrical energy provided via direct-current are used in smelting of aluminum and other electrochemical processes. It is also used for some railways, especially in urban areas. High-voltage direct current is used to transmit large amounts of power from remote generation sites or to interconnect alternating current power grids...... hope this helps UHH ❣❣❣❣❣ @doll54.....❣❣❣❣❣ آپ کا شکریہ......❣❣❣

50.

Explain why an electric lamp used in the dc line can also be used in the ac line

Answer»

Answer:

Since high voltages are more efficient for sending electricity great distances, AC electricity has an advantage over DC. This is because the high voltages from the power station can be easily reduced to a SAFER voltage for use in the house. Changing voltages is done by the use of a transformer.DIRECT current (DC) is the unidirectional flow of an electric charge. An electrochemical cell is a prime EXAMPLE of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or EVEN through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current.[1]

The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.[2][3]

Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be converted into alternating current via an inverter.

Direct current has many uses, from the charging of batteries to large power supplies for electronic systems, motors, and more. Very large quantities of electrical energy provided via direct-current are used in smelting of aluminum and other electrochemical processes. It is also used for some railways, especially in urban areas. High-voltage direct current is used to transmit large amounts of power from remote generation sites or to interconnect alternating current power grids......

hope this helps UHH ❣❣❣❣❣

@doll54.....❣❣❣❣❣

آپ کا شکریہ......❣❣❣

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Answer it I will mark it as brainliest​

An infant produces shrill voice justify the statement please don't answer rubbish​

What Ps the estimatedpt of the substancethat changes blue filmus.to red.​

The ground state energy of hydrogen atom is -13.6ev.1)what is the potential energy of an electron in 3rd excited state?2)if the electron jumps to the ground state from 3rd excited state ,calculate the wave length of the photon emitted

A wire is 20 cm long and has a cross section of 1 cm^2. If its resistance is 40 ohm, what will be its resistivity? ​

The velocity-time graph of the objects A and B makesangles 300 and 600 with the time axis. Find the ratio of their acceleration.

Answer:

Given:

To FIND:

Concept:

Calculation:

For particle A :

For particle B:

REQUIRED ratio:

Why cant electric field lines flow through conductor​

Write about Spin quantum number . ​

HEY buddy !!! here's ur ANSWER!!!

The spin quantum number is the fourth quantum number, denoted by s or ms. The spin quantum number INDICATES the ORIENTATION of the INTRINSIC angular momentum of an electron in an atom. It describes the quantum state of an electron, including its energy, orbital shape, and orbital orientation.

hope it helps you ❤️

Give Reason: free fall is possible only in vacuum.​

Answer:

Hey dear ur answer is as follow:-

-Yes. FREE fall is defined as “any motion of a body where gravity is the only force acting upon it.” In the VACUUM of space, where there are no air molecules or supportive surfaces, ASTRONAUTS are only acted upon by gravity. Thus, they are falling towards Earth at the ACCELERATION of gravity.

#BeBrainly

#FollowBae

What is the sloagon of covid 19​

An infant produces shrill voice what is the meaning of this statement​

A red Coloured lightis incident on a glassprism imagine whathappens ?​

An infant produces shrill voice what is the meaning of the statement​

SHRILLNESS/SHRILL:-

SYNONYMS:-

Please provide answer with SUITABLE 'STEPS'

Answer:

At the location of Q , we can say that :

Correct OPTION :

The thickness of a paper is 10^-4m . Find the number of papers in 1 metre​

Convert 20m/s into km/h.20 m/s =​

✔️✔️✔️✔️72✔️✔️✔️✔️

Consider the motion of tip of hours hand of clock . After 12hrs

The circuit diagram shown below is used to find the effective resistqnec of two resistors in series.which circuit diagram represents correctly

When a light ray incident normally on a glass slab what is the lateral shift

Example 1.1: What is the solid angle subtendedby the moon at any point of the Earth, giventhe diameter of the moon is 3474 km and itsdistance from the Earth 3.84x108 m.plzzz text book ka samjhao ye photo mat bhejo explain it someone plllllllzzzzzz ​

3-7llon much energy is given to each molomband change pobring through a br batteryGuwen,​

The vircuit diagram shown below is used to find the effective resistance of two resistord in series which circuit diagram represents correctly

A wire of length l, area of cross section A and resistance R is stretched so that thelength is doubled. How will its resistance and resistivity change?​

Hey people Guten Morgen !!Here's ur QQ.What is the difference between putting a resistor parallel or in series in a circuit ​

Please mark as BRAINLIEST..

how many orders will be observed by a grating having 4000lines per cm if it is illuminated by light of wavelength in the range 5000A to 7500A

Answer for the given question is opt1please please provide steps to find it out..

A car starts from rest and accelerates uniformly over a time of 7 s for a distance of 98m. Find the acceleration of the car.

While measuring the diameter of a lead-shot using a screw gauge , the reading on the pitch scale is found to be 7.5 mm and that on the head scale is 48 . If the least count is 0.01 mm and zero error is +0 l. 05 mm , find the diameter of the lead-shot .​

which among this is not a solar energy 1) bio mass 2) nuclear energy 3)wind energy 4) geothermal energy​

Please answer this question with reason​

A boy holds a laser pointer at the bottom of a pond and the light ray makes an angle to the surfacei) 35° ii) 40° iii) 49°.In which case the light ray does not cross the surface of water ? Why?​

What is the value and SI unit of Gravitational Acceleration?​

Why does change in speed of ray of light makes it change its direction of travel​

If you travel to School from homeat a uniform Speed at 30 km/hr and areturn to home from school at a UniformSpeed - af 20 Km/he following the samerioad, find out the average speedduring your complete trip!​

if the force continues to acts even after the displacement, the work done can be recovered in form of energy, if the body is set loose. This recoverable stored energy by virtue of position in a force field is defined as potential energy. CAN ANYBODY EXPLAIN ME THIS LINE

Plzzz solve this question​

A body of mass 2 kgs falls from a height of 20 m at a plane where acceleration due to gravity is10 m/s^2 velocity 15m/s then work done against air resistance

Answer:

Explain modern periodic law​

I need answer for this question please​

If A=2i+4j-4k then the unit vector in direction of A is​

If a hard substance converts into small particles behind the split glass when we don't watch that , so what will happen when we alredy keep on watching behind the split glass ?(quantum physics)​

Calculate speed of light in water of refractive index 4/3. Given speed of light in air (c)= 3x10raose to the power 8 m/s

Find average speed plz.............​

Find k so that the vector A=5i-10j and B=2ki+1/2j are parallel​

. An object of height 1.5 cm is placed at a distance of 20 cm from a concave mirror of focal length 15 cm. At whatdistance from the mirror should a screen be placed so as to get a sharp image. Where should the screen bemoved if the object is moved towards the focus?

MLCThe molar specific heat capacity of water is PR (R is gas constant]. The value of p to the nearest integTAIT TAIT पारिता nRIR गैस नियतांक है| है। निकटतम पूर्णांक में p का मान​

if a boy travel to A to B 20 cmand return to B to C 10 cm what will be the distance of displacement​

HOW ?

=> sol.

for more information, REFER to the attachment.

Find acceleration when water is filled (2/3)rd in a container ?

Explain why an electric lamp used in the dc line can also be used in the ac line​

hope this helps UHH ❣❣❣❣❣

@doll54.....❣❣❣❣❣

آپ کا شکریہ......❣❣❣

Answer it I will mark it as brainliest

An infant produces shrill voice justify the statement please don't answer rubbish

What Ps the estimatedpt of the substancethat changes blue filmus.to red.

A wire is 20 cm long and has a cross section of 1 cm^2. If its resistance is 40 ohm, what will be its resistivity?

Why cant electric field lines flow through conductor

Write about Spin quantum number .

Give Reason: free fall is possible only in vacuum.

What is the sloagon of covid 19

An infant produces shrill voice what is the meaning of this statement

A red Coloured lightis incident on a glassprism imagine whathappens ?

An infant produces shrill voice what is the meaning of the statement

The thickness of a paper is 10^-4m . Find the number of papers in 1 metre

Convert 20m/s into km/h.20 m/s =

Example 1.1: What is the solid angle subtendedby the moon at any point of the Earth, giventhe diameter of the moon is 3474 km and itsdistance from the Earth 3.84x108 m.plzzz text book ka samjhao ye photo mat bhejo explain it someone plllllllzzzzzz

3-7llon much energy is given to each molomband change pobring through a br batteryGuwen,

A wire of length l, area of cross section A and resistance R is stretched so that thelength is doubled. How will its resistance and resistivity change?

Hey people Guten Morgen !!Here's ur QQ.What is the difference between putting a resistor parallel or in series in a circuit

While measuring the diameter of a lead-shot using a screw gauge , the reading on the pitch scale is found to be 7.5 mm and that on the head scale is 48 . If the least count is 0.01 mm and zero error is +0 l. 05 mm , find the diameter of the lead-shot .

which among this is not a solar energy 1) bio mass 2) nuclear energy 3)wind energy 4) geothermal energy

Please answer this question with reason

A boy holds a laser pointer at the bottom of a pond and the light ray makes an angle to the surfacei) 35° ii) 40° iii) 49°.In which case the light ray does not cross the surface of water ? Why?

What is the value and SI unit of Gravitational Acceleration?

Why does change in speed of ray of light makes it change its direction of travel

If you travel to School from homeat a uniform Speed at 30 km/hr and areturn to home from school at a UniformSpeed - af 20 Km/he following the samerioad, find out the average speedduring your complete trip!

Plzzz solve this question

Explain modern periodic law

I need answer for this question please

If A=2i+4j-4k then the unit vector in direction of A is

If a hard substance converts into small particles behind the split glass when we don't watch that , so what will happen when we alredy keep on watching behind the split glass ?(quantum physics)

Find average speed plz.............

Find k so that the vector A=5i-10j and B=2ki+1/2j are parallel

MLCThe molar specific heat capacity of water is PR (R is gas constant]. The value of p to the nearest integTAIT TAIT पारिता nRIR गैस नियतांक है| है। निकटतम पूर्णांक में p का मान

if a boy travel to A to B 20 cmand return to B to C 10 cm what will be the distance of displacement

Explain why an electric lamp used in the dc line can also be used in the ac line