67486 + Interview Questions in Secondary School in Physics

1.	Which of the following molecule does not have sp3 hybritization(CH4 , BF3, NH3,H2O
Answer» EXPLANATION: H2O doesn't have SP3 HYBRIDIZATION

1.

Which of the following molecule does not have sp3 hybritization(CH4 , BF3, NH3,H2O

Answer»

EXPLANATION:

H2O doesn't have SP3 HYBRIDIZATION

Discussion

2.	Two point charges when seperated by 0.6 m in air repel each other by a force of 20N if the sum of the two charges is 60micro coulomb.calculate the individual chargesplz answer me with step by step calculations
Answer» Answer:40and20microcoulomb. Explanation:

2.

Two point charges when seperated by 0.6 m in air repel each other by a force of 20N if the sum of the two charges is 60micro coulomb.calculate the individual chargesplz answer me with step by step calculations

Answer»

Answer:40and20microcoulomb.

Explanation:

Discussion

3.	What is image distance in normal human eye?
Answer» ANSWER: mark my answer as brainliest then I will start FOLLOWING you Explanation: BRO NORMAL EYE range is 25cm to infinite

3.

What is image distance in normal human eye?

Answer»

ANSWER:

mark my answer as brainliest then I will start FOLLOWING you

Explanation:

BRO NORMAL EYE range is 25cm to infinite

Discussion

4.	Write few daily life example in which we observe conservation of energy
Answer» ANSWER: Turning of light while going our of the room. Buying a more fuel efficient car. Not USING a car INSTEAD of public TRANSPORT

4.

Write few daily life example in which we observe conservation of energy

Answer»

ANSWER:

Turning of light while going our of the room.

Buying a more fuel efficient car.

Not USING a car INSTEAD of public TRANSPORT

Discussion

5.	What is the unit of magnetic intensity???
Answer» EXPLANATION: HOPE TO HERE YOU SOON MATE.. the UNIT of magnectic intensity is one teala(T) hope it will help you mate

5.

What is the unit of magnetic intensity???

Answer»

EXPLANATION:

HOPE TO HERE YOU SOON MATE..

the UNIT of magnectic intensity is one teala(T)

hope it will help you mate

Discussion

6.	Why we always consider an electrons Movement in electricity
Answer» Answer: MOVEMENT IN ELECTRONS CAUSE THE FLOW OF IONS WHICH CAUSES CURRENT AND PRODUCES ELECTRICITY...THAT IS WHY WE CONSIDER THE MOVEMENT OF ELECTRONS IN ELECTRICITY

6.

Why we always consider an electrons Movement in electricity

Answer»

Answer:

MOVEMENT IN ELECTRONS CAUSE THE FLOW OF IONS WHICH CAUSES CURRENT AND PRODUCES ELECTRICITY...THAT IS WHY WE CONSIDER THE MOVEMENT OF ELECTRONS IN ELECTRICITY

Discussion

7.	When did the ecosystem form?
Answer» Answer:1935 It was in 1935 that Arthur Tansley, the British ecologist, coined the term ECOSYSTEM, the INTERACTIVE system established between the GROUP of living creatures and their biotope, the environment in which they live. Ecology THUS became the science of ecosystems Explanation: Please mark as brainliest if it is helpfull

7.

When did the ecosystem form?

Answer»

Answer:1935

It was in 1935 that Arthur Tansley, the British ecologist, coined the term ECOSYSTEM, the INTERACTIVE system established between the GROUP of living creatures and their biotope, the environment in which they live. Ecology THUS became the science of ecosystems

Explanation:

Please mark as brainliest if it is helpfull

Discussion

8.	Find the resistivity of conductor which carries a current density of 2.5x106Am-2 and electric field of is 15 V/m
Answer» $\underline{ \boxed{ \mathfrak{ \huge{ \purple{Answer}}}}} \\ \\ \star \rm \: \pink{Given} \\ \\ \implies \rm \: current \: density \: (J) = 2.5 \times {10}^{6} \: \frac{a}{ {m}^{2} } \\ \\ \implies \rm \: electric \: field \: (E) = 15 \: \frac{v}{m} \\ \\ \star \rm \: \pink{To \: Find} \\ \\ \implies \rm \: resistivity \: ( \rho) \\ \\ \star \rm \: \pink{Formula} \\ \\ \implies \rm \: relation \: between \: J ,\: E \: and \: \rho \: is \: given \: as \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \boxed{ \boxed{ \huge{ \rm{ \red{E = J\times \rho}}}}} \\ \\ \star \rm \: \pink{Calculation} \\ \\ \implies \rm \: \rho = \frac{E}{J} = \frac{15}{2.5 \times {10}^{6} } \\ \\ \implies \underline{\boxed{ \rm{ \red{ \rho = 6 \times {10}^{ - 6} \: \mho \: {m}^{ - 1} }}}}$

8.

Find the resistivity of conductor which carries a current density of 2.5x106Am-2 and electric field of is 15 V/m

Answer»

$\underline{ \boxed{ \mathfrak{ \huge{ \purple{Answer}}}}} \\ \\ \star \rm \: \pink{Given} \\ \\ \implies \rm \: current \: density \: (J) = 2.5 \times {10}^{6} \: \frac{a}{ {m}^{2} } \\ \\ \implies \rm \: electric \: field \: (E) = 15 \: \frac{v}{m} \\ \\ \star \rm \: \pink{To \: Find} \\ \\ \implies \rm \: resistivity \: ( \rho) \\ \\ \star \rm \: \pink{Formula} \\ \\ \implies \rm \: relation \: between \: J ,\: E \: and \: \rho \: is \: given \: as \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \boxed{ \boxed{ \huge{ \rm{ \red{E = J\times \rho}}}}} \\ \\ \star \rm \: \pink{Calculation} \\ \\ \implies \rm \: \rho = \frac{E}{J} = \frac{15}{2.5 \times {10}^{6} } \\ \\ \implies \underline{\boxed{ \rm{ \red{ \rho = 6 \times {10}^{ - 6} \: \mho \: {m}^{ - 1} }}}}$

Discussion

9.	Why is echo heard from mountains hills and big h?
Answer» Answer: Echo is HEARD from mountains, hills, big halls because their reflecting surface is strong, rigid and SMOOTH which make the echo very effective. And due to that REASON too they can't absorb any sound. So, echo is heard from mountains, hills, big halls.

9.

Why is echo heard from mountains hills and big h?

Answer»

Answer:

Echo is HEARD from mountains, hills, big halls because their reflecting surface is strong, rigid and SMOOTH which make the echo very effective. And due to that REASON too they can't absorb any sound. So, echo is heard from mountains, hills, big halls.

Discussion

10.	find the focal length of plano convex lens when its radius of curvature of the surface is R and n is the refractive index of lens ?
Answer» ANSWER: SIN I/sin r=constant the INDEX of CONVEX LENS

10.

find the focal length of plano convex lens when its radius of curvature of the surface is R and n is the refractive index of lens ?

Answer»

ANSWER:

SIN I/sin r=constant the INDEX of CONVEX LENS

Discussion

11.	an electric bulb is marked as 250w-200v .what information does it convey ?how many joules of energy is consumed by this bulb in an hour?how long will the bulb take to consume 1kwh?
Answer» ANSWER: PLEASE REFER to the attachment for answer .

11.

an electric bulb is marked as 250w-200v .what information does it convey ?how many joules of energy is consumed by this bulb in an hour?how long will the bulb take to consume 1kwh?

Answer»

ANSWER:

PLEASE REFER to the attachment for answer .

Discussion

12.	A 3cm tall object is placed at a distance of 18cm in front of a concave mirror of focal length 12cm.find the position,nature and size of the image formed.
Answer» Explanation: given, HEIGHT of OBJECT,h = 3 cm object distance,u = -18 cm (since concave mirror) focal length,f = -12 cm now, using the formula 1/u + 1/v = 1/f 1/-18 + 1/ v = 1/-12 1/v= 1/18+1/-12 1/v= (2+3)/36 1/v= 5/36 v= 36/5 v= 7.2 hence, image distance is 7.2 cm and it will form back side of the concave mirror now magnification m= h'/h or m=-v/u then we have h'/h= -v/u h'/3=-(36/5)/(-18) = 36/5 * 1/18 = 2/5 * 1 5h'= 6 h' = 6/5 h' = 1.2cm hence we can CONCLUDE that the image will be 1.2 cm bigger than the object

12.

A 3cm tall object is placed at a distance of 18cm in front of a concave mirror of focal length 12cm.find the position,nature and size of the image formed.

Answer»

Explanation:

given, HEIGHT of OBJECT,h = 3 cm

object distance,u = -18 cm (since concave mirror)

focal length,f = -12 cm

now, using the formula

1/u + 1/v = 1/f

1/-18 + 1/ v = 1/-12

1/v= 1/18+1/-12

1/v= (2+3)/36

1/v= 5/36

v= 36/5

v= 7.2

hence, image distance is 7.2 cm

and it will form back side of the concave mirror

now magnification

m= h'/h

or m=-v/u

then we have h'/h= -v/u

h'/3=-(36/5)/(-18)

= 36/5 * 1/18

= 2/5 * 1

5h'= 6

h' = 6/5

h' = 1.2cm

hence we can CONCLUDE that the image will be 1.2 cm bigger than the object

Discussion

13.	Show that work done on a body by a conservative force is equal to the change in its kinetic energy.
Answer» Answer: Let us now consider what form the work-energy theorem takes when only conservative forces are involved. This will LEAD us to the conservation of energy principle. The work-energy theorem STATES that the NET work done by all forces ACTING on a system equals its change in kinetic energy. Explanation:

13.

Show that work done on a body by a conservative force is equal to the change in its kinetic energy.

Answer»

Answer:

Let us now consider what form the work-energy theorem takes when only conservative forces are involved. This will LEAD us to the conservation of energy principle. The work-energy theorem STATES that the NET work done by all forces ACTING on a system equals its change in kinetic energy.

Explanation:

Discussion

14.	Compare the power,tenure and working of both house of Indian parliament.
Answer» Answer: The TENURE of LOK SABHA is only for five years, after which it dissolves, whereas the Rajya Sabha is a permanent HOUSE, but after every two years, one third of its members resign. A member who is elected for a full TERM serves for a period of six years in Rajya Sabha. Lok Sabha is more powerful than Rajya Sabha.

14.

Compare the power,tenure and working of both house of Indian parliament.

Answer»

Answer:

The TENURE of LOK SABHA is only for five years, after which it dissolves, whereas the Rajya Sabha is a permanent HOUSE, but after every two years, one third of its members resign. A member who is elected for a full TERM serves for a period of six years in Rajya Sabha. Lok Sabha is more powerful than Rajya Sabha.

Discussion

15.	Which of the following has more inertia first rubber ball and stone of same size second cycle entry in third of five rupees coin and oven rupee coin
Answer» Answer: MASS is the measure of inertia Explanation: STONE has more inertia than a RUBBER BALL becoz of more mass and second ques is not understandable so couldnot answer SORRY for not answerring the second one

15.

Which of the following has more inertia first rubber ball and stone of same size second cycle entry in third of five rupees coin and oven rupee coin

Answer»

Answer:

MASS is the measure of inertia

Explanation: STONE has more inertia than a RUBBER BALL becoz of more mass

and second ques is not understandable so couldnot answer SORRY for not answerring the second one

Discussion

16.	A body of mass 5 kg is pulled with time varying horizontal force F = 3t N (where t is in second) on rough surface having coefficient of friction μ = 0.3. The acceleration of the block at t = 10 s will be (g = 10 m/s2)
Answer» ANSWER: 9 m/s2 Explanation: MARK the answer BRAINLIESTS PLEASE

16.

A body of mass 5 kg is pulled with time varying horizontal force F = 3t N (where t is in second) on rough surface having coefficient of friction μ = 0.3. The acceleration of the block at t = 10 s will be (g = 10 m/s2)

Answer»

ANSWER:

9 m/s2

Explanation:

MARK the answer BRAINLIESTS PLEASE

Discussion

17.	If momentum of an object is increased by 10% then its kinetic energy will increase(1) 20%(2) 21%(3) 40%(4) 19%
Answer» Answer: HEY there!! I am here to give you the answer.... EXPLANATION: kinetic energy , KE = P²/2m here p= MOMENTUM m= mass of the object if p is INCREASED by 10% i.e., 0.1 times KE will inceases to by 100% so the kinetic energy will become twice the original. so option 1) 20% is the correct option. Hope it HELPS you. Follow me [email protected]

17.

If momentum of an object is increased by 10% then its kinetic energy will increase(1) 20%(2) 21%(3) 40%(4) 19%

Answer»

Answer:

HEY there!! I am here to give you the answer....

EXPLANATION:

kinetic energy , KE = P²/2m

here p= MOMENTUM

m= mass of the object

if p is INCREASED by 10% i.e., 0.1 times KE will inceases to by 100%

so the kinetic energy will become twice the original.

so option 1) 20% is the correct option.

Hope it HELPS you.

Follow me [email protected]

Discussion

18.	What is meant by relative refractive index
Answer» ᴰᵉᶠⁱⁿᵉ ʳᵉˡᵃᵗⁱᵛᵉ ʳᵉᶠʳᵃᶜᵗⁱᵛᵉ ⁱⁿᵈᵉˣ. ✿ ᴬᴺˢᵂᴱᴿ. ✿ ᵂʰᵉⁿ ʷᵉ ᵐᵉᵃˢᵘʳᵉ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ᵗʷᵒ ᵈⁱᶠᶠᵉʳᵉⁿᵗ ᵐᵉᵈⁱᵃ, ʳᵉˡᵃᵗⁱᵛᵉ ʳᵉᶠʳᵃᶜᵗⁱᵛᵉ ⁱⁿᵈᵉˣ ᵒᶠ ᵐᵉᵈⁱᵘᵐ ² ʷⁱᵗʰ ʳᵉˢᵖᵉᶜᵗ ᵗᵒ ᵐᵉᵈⁱᵘᵐ ¹ ⁱˢ ᵈᵉᶠⁱⁿᵉᵈ ᵃˢ ᵗʰᵉ ʳᵃᵗⁱᵒ ᵒᶠ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ᵐᵉᵈⁱᵘᵐ ¹ ᵗᵒ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ᵐᵉᵈⁱᵘᵐ ². ⁿ²¹⁼ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ¹ˢᵗ ᵐᵉᵈⁱᵘᵐ / ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ˢᵉᶜᵒⁿᵈ ᵐᵉᵈⁱᵘᵐ. ✷✷hope it HELPS you ❤️✌️✷✷

18.

What is meant by relative refractive index

Answer»

ᴰᵉᶠⁱⁿᵉ ʳᵉˡᵃᵗⁱᵛᵉ ʳᵉᶠʳᵃᶜᵗⁱᵛᵉ ⁱⁿᵈᵉˣ.

✿ ᴬᴺˢᵂᴱᴿ. ✿

ᵂʰᵉⁿ ʷᵉ ᵐᵉᵃˢᵘʳᵉ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ᵗʷᵒ ᵈⁱᶠᶠᵉʳᵉⁿᵗ ᵐᵉᵈⁱᵃ, ʳᵉˡᵃᵗⁱᵛᵉ ʳᵉᶠʳᵃᶜᵗⁱᵛᵉ ⁱⁿᵈᵉˣ ᵒᶠ ᵐᵉᵈⁱᵘᵐ ² ʷⁱᵗʰ ʳᵉˢᵖᵉᶜᵗ ᵗᵒ ᵐᵉᵈⁱᵘᵐ ¹ ⁱˢ ᵈᵉᶠⁱⁿᵉᵈ ᵃˢ ᵗʰᵉ ʳᵃᵗⁱᵒ ᵒᶠ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ᵐᵉᵈⁱᵘᵐ ¹ ᵗᵒ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ᵐᵉᵈⁱᵘᵐ ². ⁿ²¹⁼ ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ¹ˢᵗ ᵐᵉᵈⁱᵘᵐ / ˢᵖᵉᵉᵈ ᵒᶠ ˡⁱᵍʰᵗ ⁱⁿ ˢᵉᶜᵒⁿᵈ ᵐᵉᵈⁱᵘᵐ.

✷✷hope it HELPS you ❤️✌️✷✷

Discussion

19.	Explain the law of conservation of energy-
Answer» Answer: energy is neither CREATED nor destroyed it PASS from one BODY to another hope it helps stay safe from corona')

19.

Explain the law of conservation of energy-

Answer»

Answer:

energy is neither CREATED nor destroyed it PASS from one BODY to another

hope it helps

stay safe from corona')

Discussion

20.	Which one of the following is not a carburizing salta)sodium carbonateb)sodium sulphatec)sodium cyanided)barium chloride
Answer» ANSWER: d. will be CORRECT ANSWERS

20.

Which one of the following is not a carburizing salta)sodium carbonateb)sodium sulphatec)sodium cyanided)barium chloride

Answer»

ANSWER:

d. will be CORRECT ANSWERS

Discussion

21.	What is additional reaction class-1st
Answer» Answer: An addition reaction, in organic CHEMISTRY, is in its simplest terms an organic reaction where two or more molecules combine to form a LARGER one (the adduct).[1][2] Addition REACTIONS are limited to chemical compounds that have multiple bonds, such as molecules with carbon–carbon double bonds (alkenes), or with triple bonds (alkynes). Molecules containing carbon—hetero double bonds like carbonyl (C=O) groups, or imine (C=N) groups, can undergo addition, as they too have double-bond character. An addition reaction

21.

What is additional reaction class-1st

Answer»

Answer:

An addition reaction, in organic CHEMISTRY, is in its simplest terms an organic reaction where two or more molecules combine to form a LARGER one (the adduct).[1][2]

Addition REACTIONS are limited to chemical compounds that have multiple bonds, such as molecules with carbon–carbon double bonds (alkenes), or with triple bonds (alkynes). Molecules containing carbon—hetero double bonds like carbonyl (C=O) groups, or imine (C=N) groups, can undergo addition, as they too have double-bond character.

An addition reaction

Discussion

22.	The kinetic energy of one molecule of a gas at normal temperature and pressure will be
Answer» ANSWER: The kinetic energy of one gram MOLECULE of a GAS at normal TEMPERATURE and pressure is (R=8.31J/mol-K) ASK DOUBT NOW!

22.

The kinetic energy of one molecule of a gas at normal temperature and pressure will be

Answer»

ANSWER:

The kinetic energy of one gram MOLECULE of a GAS at normal TEMPERATURE and pressure is (R=8.31J/mol-K) ASK DOUBT NOW!

Discussion

23.	What do speedometer and odometer for used
Answer» ANSWER: SPEEDOMETER - To measure the SPEED of a vehicle Odometer - To measure the DISTANCE EXPLANATION:

23.

What do speedometer and odometer for used

Answer»

ANSWER:

SPEEDOMETER - To measure the SPEED of a vehicle

Odometer - To measure the DISTANCE

EXPLANATION:

Discussion

24.	If the velocity of sound in air is 35m/s,a person is singing a note of 250 cycles per second is producing sound waves with a wave length of
Answer» Explanation: 0.14 m SINCE VELOCITY of sound in air is equal to the product of the wavelength and the frequency(CYCLES), we can DIVIDE the velocity of sound in air with the amount of cycles since they're both given.

24.

If the velocity of sound in air is 35m/s,a person is singing a note of 250 cycles per second is producing sound waves with a wave length of

Answer»

Explanation:

0.14 m

SINCE VELOCITY of sound in air is equal to the product of the wavelength and the frequency(CYCLES), we can DIVIDE the velocity of sound in air with the amount of cycles since they're both given.

Discussion

25.	Why electric field doesn't present inside the conductor
Answer» ANSWER: and PLEASE THANK me and MARK BRAINLIEST please

25.

Why electric field doesn't present inside the conductor

Answer»

ANSWER:

and PLEASE THANK me and MARK BRAINLIEST please

Discussion

26.	10^6 electrons are moving through a wire per second,current developed is ?
Answer» EXPLANATION: I= v/r use this FORMULA to GET the ANSWER

26.

10^6 electrons are moving through a wire per second,current developed is ?

Answer»

EXPLANATION:

I= v/r

use this FORMULA to GET the ANSWER

Discussion

27.	Name two sources of energy that you think are non renewablesorces of energy? give reason
Answer» Non-renewable ENERGY comes from SOURCES that will run out or will not be replenished for THOUSANDS or even millions of YEARS. Most sources of non-renewable energy are fossil fuels. Fossil fuels were created as the remains of marine creatures decayed millions of years ago, under huge amounts of pressure and heat.

27.

Name two sources of energy that you think are non renewablesorces of energy? give reason

Answer»

Non-renewable ENERGY comes from SOURCES that will run out or will not be replenished for THOUSANDS or even millions of YEARS. Most sources of non-renewable energy are fossil fuels. Fossil fuels were created as the remains of marine creatures decayed millions of years ago, under huge amounts of pressure and heat.

Discussion

28.	What happens to the force between two objects, ifD) the mass of one object is doubled?3) the distance between the objects is doubled antripled?m) Differentiate between 'G' and 'g
Answer» Answer: if the mass one one object is doubled then the force between two objects will also be doubled . note . force is directly proportional to the mass if the distance is doubled , then the force is one - forth and if the distance is tripled then the force is one - ninth. note . force is inversely proportional to the distance. G - it is a gravitational constant . it's value is fixed i.e., 6.67 Nm^2 / kg ^2 . g- g stands for ACCELERATION due to the gravity . it's value is not fixed . it varies from place to place . i.e., 9.8 N. even we TAKES it 10 N . hope it helps you

28.

What happens to the force between two objects, ifD) the mass of one object is doubled?3) the distance between the objects is doubled antripled?m) Differentiate between 'G' and 'g

Answer»

Answer:

if the mass one one object is doubled then the force between two objects will also be doubled .

note . force is directly proportional to the mass

if the distance is doubled , then the force is one - forth and if the distance is tripled then the force is one - ninth.

note . force is inversely proportional to the distance.

G - it is a gravitational constant . it's value is fixed i.e., 6.67 Nm^2 / kg ^2 .
g- g stands for ACCELERATION due to the gravity . it's value is not fixed . it varies from place to place . i.e., 9.8 N. even we TAKES it 10 N .

hope it helps you

Discussion

29.	Why is coal called black gold
Answer» ANSWER: “Black gold” usually refers to oil, based on the PERCEIVED “bonanza” POTENTIAL being similar to striking it RICH as a gold PROSPECTOR.

29.

Why is coal called black gold

Answer»

ANSWER:

“Black gold” usually refers to oil, based on the PERCEIVED “bonanza” POTENTIAL being similar to striking it RICH as a gold PROSPECTOR.

Discussion

30.	Define moment of a force about an axis or point.
Answer» Answer: TURNING effect of force applied to a rotational system at a distance from the AXIS of rotation. The MOMENT is equal to the magnitude of the force multiplied by the perpendicular distance between its LINES of ACTION and the axis of rotation.

30.

Define moment of a force about an axis or point.

Answer»

Answer:

TURNING effect of force applied to a rotational system at a distance from the AXIS of rotation. The MOMENT is equal to the magnitude of the force multiplied by the perpendicular distance between its LINES of ACTION and the axis of rotation.

Discussion

31.	A person initially at point Pillustration stays their a mommentand then moves along the axis to Q and stays their a momment. she then turns quickly to R stays their a momment,and then strolls slowly back to Q what will be the position VS time graph correctly represent the motion
Answer» ANSWER: Jjzn Explanation:

31.

A person initially at point Pillustration stays their a mommentand then moves along the axis to Q and stays their a momment. she then turns quickly to R stays their a momment,and then strolls slowly back to Q what will be the position VS time graph correctly represent the motion

Answer»

ANSWER:

Jjzn

Explanation:

Discussion

32.	Determine the energy loss if substance (density = 1170 kg/m^3 and dynamic viscosity = 0,4029 Pa*s) flows 28 meter through a 165 mm inside diameter pipe with an average velocity of 3,2 m/s. Express result in meter [m]
Answer» ANSWER: I THINK QUESTION is HALF......

32.

Determine the energy loss if substance (density = 1170 kg/m^3 and dynamic viscosity = 0,4029 Pa*s) flows 28 meter through a 165 mm inside diameter pipe with an average velocity of 3,2 m/s. Express result in meter [m]

Answer»

ANSWER:

I THINK QUESTION is HALF......

Discussion

33.	2. A ball is thrown vertically upwards. Whichof the following graphs represents thespeed (v)-time (t) graph of the ball duringits height of the air resistance is notignored?VA8
Answer» Explanation: Given AIR resistance is not ignored.Taking downward as positive y direction. Equation of MOTION for upward motion, mg−kv=ma, where kv is the air drag. Downward motion, mg+kv=−m ∂t ∂v SOLVING the equation gives us an EXPONENTIAL function i.e a function which is not linear Hence FOURTH graph is most appropriate

33.

2. A ball is thrown vertically upwards. Whichof the following graphs represents thespeed (v)-time (t) graph of the ball duringits height of the air resistance is notignored?VA8

Answer»

Explanation:

Given AIR resistance is not ignored.Taking downward as positive y direction.

Equation of MOTION for upward motion,

mg−kv=ma, where kv is the air drag.

Downward motion,

mg+kv=−m

∂t

∂v

SOLVING the equation gives us an EXPONENTIAL function i.e a function which is not linear

Hence FOURTH graph is most appropriate

Discussion

34.	Velocity of sound in hydrogen is1600 ms. Find velocity of sound ina mixture of gases in which H2 andO2 are mixed in the ratio 4:1 byvolume.y same for H2 and 02
Answer» ओमेमेमेभैमेमेमेएमेभेमेभेभूढूढ ढंग ढंग ढंग ढंग ढंग ढंग ढंग ढ

Discussion

35.	The particle is executing S.H.M. on a line 4 cms long. If its velocity at mean position is 12 cm/sec its frequency in Hertz will be :
Answer» Answer:3/2pie Explanation: here W= OMEGA A=4CM Vmean= 12CM/SEC V=W UNDERROOT $A^2-x^2$ (x=0) V=AW 12=4W W=3 W=2PIE f f=3/2pie

35.

The particle is executing S.H.M. on a line 4 cms long. If its velocity at mean position is 12 cm/sec its frequency in Hertz will be :

Answer»

Answer:3/2pie

Explanation: here W= OMEGA

A=4CM

Vmean= 12CM/SEC

V=W UNDERROOT $A^2-x^2$ (x=0)

V=AW

12=4W

W=3

W=2PIE f

f=3/2pie

Discussion

36.	Find the number of electrons in 16 C of charge
Answer» ANSWER: HOPE it will HELP you:-)

36.

Find the number of electrons in 16 C of charge

Answer»

ANSWER:

HOPE it will HELP you:-)

Discussion

37.	as per latest research a proton and a neutron consist of three constituent each.if two type of constituent particle denoted by 'X' of charge 2e/3 and 'Y' of charge -e/3, together with electron wild up the matter. find possible composition of proton or neutron?
Answer» This is your ANSWER HOPE you LIKE IR

37.

as per latest research a proton and a neutron consist of three constituent each.if two type of constituent particle denoted by 'X' of charge 2e/3 and 'Y' of charge -e/3, together with electron wild up the matter. find possible composition of proton or neutron?

Answer»

This is your ANSWER HOPE you LIKE IR

Discussion

38.	What is a beam of light consisting of Ray's coming closer to each other and meeting at a point called
Answer» ANSWER: FOCUS is the answer......

38.

What is a beam of light consisting of Ray's coming closer to each other and meeting at a point called

Answer»

ANSWER:

FOCUS is the answer......

Discussion

39.	Significance of red, blue and green colour wires in electric circuits
Answer» Answer: Explanation: Black WIRES SIGNIFIES neutral wire in electric CIRCUIT Red wire signifies the phase in electric circuit. It is the live wire. Green wire stands for grounding/ earthing in electric circuit. hope so it WOULD help U

39.

Significance of red, blue and green colour wires in electric circuits

Answer»

Answer:

Explanation:

Black WIRES SIGNIFIES neutral wire in electric CIRCUIT

Red wire signifies the phase in electric circuit. It is the live wire.

Green wire stands for grounding/ earthing in electric circuit.

hope so it WOULD help U

Discussion

40.	The half life of a radioactive element is 40 minutes the amount that will decay in 2 hours?
Answer» HOPE THIS HELPS YOU !!!

Discussion

41.	A man travells a distance of 1.5m towards east then 2.0m towards south finally 4.5m towards east(A) what is the total distance travelled?(B)what is the magnitude of his total displacement ?
Answer» Please refer to the ATTACHMENT for the full QUESTION and MARK me as BRAINLIEST if I have HELPED you!

41.

A man travells a distance of 1.5m towards east then 2.0m towards south finally 4.5m towards east(A) what is the total distance travelled?(B)what is the magnitude of his total displacement ?

Answer»

Please refer to the ATTACHMENT for the full QUESTION and MARK me as BRAINLIEST if I have HELPED you!

Discussion

42.	Pls answer to be brainlistAnd that question which starts with 70 calories
Answer» Answer: The answer is 40 CALORIES.. pls mark me as the BRAINLIEST :)

42.

Pls answer to be brainlistAnd that question which starts with 70 calories

Answer»

Answer:

The answer is 40 CALORIES..

pls mark me as the BRAINLIEST :)

Discussion

43.	How to find whether a substance is para , dia or ferromagnetic?
Answer» ANSWER: HOPE this will help you Explanation: PLS mark as BRAINLIEST

43.

How to find whether a substance is para , dia or ferromagnetic?

Answer»

ANSWER:

HOPE this will help you

Explanation:

PLS mark as BRAINLIEST

Discussion

44.	4 cm tall object placed in front of a concave mirror of focal length 12cm.Object is placed at 24 cm from pole of the mirror. Draw diagram by choosing appropriate scale and determine position , size and nature of the image from the diagram drawn .
Answer» ANSWER: size=4cm nature=12cm position=24cm Explanation: PLEASE MAKE me as BRAINILIST.

44.

4 cm tall object placed in front of a concave mirror of focal length 12cm.Object is placed at 24 cm from pole of the mirror. Draw diagram by choosing appropriate scale and determine position , size and nature of the image from the diagram drawn .

Answer»

ANSWER:

size=4cm

nature=12cm

position=24cm

Explanation:

PLEASE MAKE me as BRAINILIST.

Discussion

45.	What are the features of Light ?
Answer» ANSWER: PLZZZ MARK as BRAINLIST plzzz

45.

What are the features of Light ?

Answer»

ANSWER:

PLZZZ MARK as BRAINLIST plzzz

Discussion

46.	explain the subtle distinction bwtween newton's 1st law of motion and galileos assertion that force is not necessary to sustain horizontal motion
Answer» Answer:hey this is simple galileo says,"If a body is in REST it WIL remains in rest and if it is in motion it will remain in motion "but NEWTON baba says,"If a body is in rest it will remain in rest and (vice-versa)*until and unless external FORCE is applied to it * Explanation:

46.

explain the subtle distinction bwtween newton's 1st law of motion and galileos assertion that force is not necessary to sustain horizontal motion

Answer»

Answer:hey this is simple galileo says,"If a body is in REST it WIL remains in rest and if it is in motion it will remain in motion "but NEWTON baba says,"If a body is in rest it will remain in rest and (vice-versa)***until and unless external FORCE is applied to it ***

Explanation:

Discussion

47.	How many electrons make up a charge of 20 UC
Answer» Answer: 10 COULOMB = 6.25 X 10^19 ELECTRONS. So, 1 coulomb charge=0.625×10^19 NUMBER of electrons

47.

How many electrons make up a charge of 20 UC

Answer»

Answer:

10 COULOMB = 6.25 X 10^19 ELECTRONS.

So, 1 coulomb charge=0.625×10^19 NUMBER of electrons

Discussion

48.	Modulus of rigidity relates to change in ?
Answer» Explanation: MODULUS of RIGIDITY or shear modulus is the rate of change of unit shear stress with RESPECT to unit shear strain for the condition of pure shear within the PROPORTIONAL limit. Modulus of rigidity formula is G = E/(2(1+v)), and modulus of rigidity is G, elastic modulus is E and Poisson's ratio is v in the formula

48.

Modulus of rigidity relates to change in ?

Answer»

Explanation:

MODULUS of RIGIDITY or shear modulus is the rate of change of unit shear stress with RESPECT to unit shear strain for the condition of pure shear within the PROPORTIONAL limit. Modulus of rigidity formula is G = E/(2(1+v)), and modulus of rigidity is G, elastic modulus is E and Poisson's ratio is v in the formula

Discussion

49.	Determine the energy loss if substance (density = 1170 kg/m^3 and dynamic viscosity = 0,4029 Pa*s) flows 28 meter through a 165 mm inside diameter pipe with an average velocity of 3,2 m/s.Express result in meter [m]
Answer» ANSWER: You are in which CLASS.

49.

Determine the energy loss if substance (density = 1170 kg/m^3 and dynamic viscosity = 0,4029 Pa*s) flows 28 meter through a 165 mm inside diameter pipe with an average velocity of 3,2 m/s.Express result in meter [m]

Answer»

ANSWER:

You are in which CLASS.

Discussion

50.	Please answer the question in attachment.
Answer» HEY DUDE your ANSWER is 1. 30° Hope it's help Mark as BRAINLIEST ❤️

50.

Please answer the question in attachment.

Answer»

HEY DUDE your ANSWER is

1. 30°

Hope it's help

Mark as BRAINLIEST ❤️

Discussion

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ᴰᵉᶠⁱⁿᵉ ʳᵉˡᵃᵗⁱᵛᵉ ʳᵉᶠʳᵃᶜᵗⁱᵛᵉ ⁱⁿᵈᵉˣ.

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Please answer the question in attachment.