67486 + Interview Questions in Secondary School in Physics

1.	The work done in moving a charge of 8 C from a point of potential 140 V to point of potential 180 V112J1120J320J1440J
Answer» Potential energy = 40 V charge = 8C Potential ENERGY = work done / charge 40 = work done / 8 40×8 = work done 320 = work done follow me mark me as BRAINLIEST

1.

The work done in moving a charge of 8 C from a point of potential 140 V to point of potential 180 V112J1120J320J1440J

Answer»

Potential energy = 40 V

charge = 8C

Potential ENERGY = work done / charge

40 = work done / 8

40×8 = work done

320 = work done

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Discussion

2.	The real image is formed by a concave mirror is larger than the object when the object is
Answer» the REAL image is formed by a concave mirror is LARGER than OBJECT is TRANSLUCENT

Discussion

3.	If net unbalanced external force acting on an object is zero, then(A) Velocity of object may or may not be zero(B) Acceleration of object must be zero(C) Velocity of object must be non-zero(D) Acceleration of object must be non-zero constantChoose the correct option
Answer» The correct option would be B) ACCELERATION of object must be zero Explanation: When all the forces acting on an object become zero, then object maintains a CONSTANT velocity If the velocity is zero it REMAINS at rest otherwise it moves with same constant velocity We also know that acceleration is equal to the CHANGE in velocity with respect to time If velocity does not change. Then Vf-Vi = 0 Acceleration = (Vf-Vi)/t = 0/t = o Thus, acceleration would be equal to zero

3.

If net unbalanced external force acting on an object is zero, then(A) Velocity of object may or may not be zero(B) Acceleration of object must be zero(C) Velocity of object must be non-zero(D) Acceleration of object must be non-zero constantChoose the correct option

Answer»

The correct option would be B) ACCELERATION of object must be zero

Explanation:

When all the forces acting on an object become zero, then object maintains a CONSTANT velocity

If the velocity is zero it REMAINS at rest otherwise it moves with same constant velocity

We also know that acceleration is equal to the CHANGE in velocity with respect to time

If velocity does not change. Then Vf-Vi = 0

Acceleration = (Vf-Vi)/t = 0/t = o

Thus, acceleration would be equal to zero

Discussion

4.	a divergent lens of focal lenth 30 cm form an image of the size 6cm at same side at the object at a distance of 15 cm from its optical centre . use lens formula to determine the distance of the object from the lens and the size of the object . also draw the ray diagram
Answer» $\implies\texttt\green{Answer \: in \: the \: attachment}$

Discussion

5.	The bus is moving with a speed of 36khm in 15 min . find distance
Answer» Answer: distance = speed ÷ time 36 km / h ÷ 1/4 9 km Explanation: PLEASE subscribe my CHANNEL Arnav EDUCATIONAL

5.

The bus is moving with a speed of 36khm in 15 min . find distance

Answer»

Answer:

distance = speed ÷ time

36 km / h ÷ 1/4

9 km

Explanation:

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Discussion

6.	Which of the following terms does not represent electrical power in a circuit?
Answer» Explanation: In PHYSICS, the rate of electrical energy transfer by an electrical circuit PER UNIT time is determined by ELECTRIC power. It is denoted by P measured using the SI unit one joule per SECOND or watt. The formula for electric power P = VI……………………..(1) Where P = Electric power V = Potential difference in the circuit I = Electric current. From ohms law V = IR……………………….(2) Substitute equation (2) in (1) we get P = (IR)I P = I2R……………………….(3) From ohm’s law I = V/R…………………………(4) Substituting equation (4) in equation (1), we get P = V2/R..……………………(5) The equation (1), (3) and (5) represents the electric power, whereas IR2 does not represent the electric power. please mark it as best...

6.

Which of the following terms does not represent electrical power in a circuit?

Answer»

Explanation:

In PHYSICS, the rate of electrical energy transfer by an electrical circuit PER UNIT time is determined by ELECTRIC power. It is denoted by P measured using the SI unit one joule per SECOND or watt.

The formula for electric power

P = VI……………………..(1)

Where

P = Electric power

V = Potential difference in the circuit

I = Electric current.

From ohms law

V = IR……………………….(2)

Substitute equation (2) in (1) we get

P = (IR)I

P = I2R……………………….(3)

From ohm’s law

I = V/R…………………………(4)

Substituting equation (4) in equation (1), we get

P = V2/R..……………………(5)

The equation (1), (3) and (5) represents the electric power, whereas IR2 does not represent the electric power.

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Discussion

7.	A boy walls on a horizontalroad and travels 2.5m withconstant speed of 5 km/h.Then he returns to the same point with a speed of 7km/h. What isthe average speed over theinterval of inof time-o to 30 min
Answer» Answer: 3.5 hopefully it HELP MARK as BRAINLIEST HOPE it help mark as brainliest hope it help mark

7.

A boy walls on a horizontalroad and travels 2.5m withconstant speed of 5 km/h.Then he returns to the same point with a speed of 7km/h. What isthe average speed over theinterval of inof time-o to 30 min

Answer»

Answer:

3.5

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Discussion

8.	Calculate the amount of heat energy produced when 1A current flow through a 10ohm resistance wire for 1 hour
Answer» ANSWER:answer :3600Js hopefully WAITING for U to MARK me as brainliest Explanation:

8.

Calculate the amount of heat energy produced when 1A current flow through a 10ohm resistance wire for 1 hour

Answer»

ANSWER:answer :3600Js

hopefully WAITING for U to MARK me as brainliest

Explanation:

Discussion

9.	Which law gives relationship between current & potential differenceMaxwell's lawCoulomb's LawNewton lawOhm's law
Answer» Explanation: Ohm's LAW....... HOPE it will help U .....

9.

Which law gives relationship between current & potential differenceMaxwell's lawCoulomb's LawNewton lawOhm's law

Answer»

Explanation:

Ohm's LAW.......

HOPE it will help U .....

Discussion

10.	Mudguards are provided on the front and the rear wheels of scooter or cycle too. Why?
Answer» ★ Mᴜᴅɢᴜᴀʀᴅ ★ Mudguard : Mudguard is a tool which is fixed to front and rear tires of a cycle or motor BIKE . They are used to stop it from throwing off mud, water , small stones or objects from the road. If small sharp objects on the road stuck in the tire it makes a punchur it cost APPROXIMATELY 60₹ for bike & sports cycle . ★ More About Mudguards ★ In olden DAYS there would be only cycles for cycles they use iron or steel round mudguards. Nowadays , iron gets rusted so we are using stylish mudguards made up of fibre or plastic . Mudguards are also known as FENDERS & wings Note : See the attachment for difference between the OLD and new mudguards

10.

Mudguards are provided on the front and the rear wheels of scooter or cycle too. Why?

Answer»

★ Mᴜᴅɢᴜᴀʀᴅ ★

Mudguard : Mudguard is a tool which is fixed to front and rear tires of a cycle or motor BIKE . They are used to stop it from throwing off mud, water , small stones or objects from the road. If small sharp objects on the road stuck in the tire it makes a punchur it cost APPROXIMATELY 60₹ for bike & sports cycle .

★ More About Mudguards ★

In olden DAYS there would be only cycles for cycles they use iron or steel round mudguards.
Nowadays , iron gets rusted so we are using stylish mudguards made up of fibre or plastic .
Mudguards are also known as FENDERS & wings

Note : See the attachment for difference between the OLD and new mudguards

Discussion

11.	Is tachyons fastest in the universe
Answer» Answer: Tachyons are HYPOTHETICAL PARTICLES that travel faster than light. According to Einstein's SPECIAL theory of relativity – and according to experiment so FAR – in our 'real' world, particles can NEVER travel faster than light.

11.

Is tachyons fastest in the universe

Answer»

Answer:

Tachyons are HYPOTHETICAL PARTICLES that travel faster than light. According to Einstein's SPECIAL theory of relativity – and according to experiment so FAR – in our 'real' world, particles can NEVER travel faster than light.

Discussion

12.	A 120 kg motorbike plus 80 kg rider is to accelerate from zero to 5 m S^-2 in 0.8 S. Estimate the average force required.
Answer» Explanation: m = 120kg + 80kg = 200kg A1 = 0m/s² A2 = 5m/s² t = 0.8sec F = ma ( Newton's second LAW of motion) F1 = (200)(0) = 0N ----(1) F2 = (200)(5) =. 1000N ----(2) now, (1)+(2)/2 -----> average = 0+1000/2 = 1000/2 = 500N ...:)!):) might help you

12.

A 120 kg motorbike plus 80 kg rider is to accelerate from zero to 5 m S^-2 in 0.8 S. Estimate the average force required.

Answer»

Explanation:

m = 120kg + 80kg = 200kg

A1 = 0m/s²

A2 = 5m/s²

t = 0.8sec

F = ma ( Newton's second LAW of motion)

F1 = (200)(0)

= 0N ----(1)

F2 = (200)(5)

=. 1000N ----(2)

now, (1)+(2)/2 -----> average

= 0+1000/2

= 1000/2 = 500N ...:)!):) might help you

Discussion

13.	Method of removing zero error from the measurement
Answer» Answer: Hope this will help you PLEASE mark me as brainleast Explanation: Zero error is simply the READING of the MEASURING device when input quantity is zero. ... Zero correction means to MAKE the adjustment in such a way that the measuring instrument SHOWS zero, when input is zero.

13.

Method of removing zero error from the measurement

Answer»

Answer:

Hope this will help you

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Explanation:

Zero error is simply the READING of the MEASURING device when input quantity is zero. ... Zero correction means to MAKE the adjustment in such a way that the measuring instrument SHOWS zero, when input is zero.

Discussion

14.	Please give the correct answer with proper explanation.
Answer» ANSWER: A force is a push or PULL UPON an object RESULTING from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.

14.

Please give the correct answer with proper explanation.

Answer»

ANSWER:

A force is a push or PULL UPON an object RESULTING from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.

Discussion

15.	Drift velocity Vè varies with intensity of electric field as per the relation
Answer» hope this ATTACHMENT HELPS you mark as BRAINLEST ANSWER please

15.

Drift velocity Vè varies with intensity of electric field as per the relation

Answer»

hope this ATTACHMENT HELPS you

mark as BRAINLEST ANSWER please

Discussion

16.	What were the physical activities i your childhood that you still today? Do you spend more time now in doing these activities as compared to before? Cite an example.
Answer» ANSWER: what TYM at u STUDY during CORINA virus may I ASK

16.

What were the physical activities i your childhood that you still today? Do you spend more time now in doing these activities as compared to before? Cite an example.

Answer»

ANSWER:

what TYM at u STUDY during CORINA virus may I ASK

Discussion

17.	Find the value of x x>-5
Answer» ANSWER: -5x Explanation: x-5=-5x Hope this will HELP you PLEASE MARK me as BRAINLEAST

17.

Find the value of x x>-5

Answer»

ANSWER:

-5x

Explanation:

x-5=-5x

Hope this will HELP you

PLEASE MARK me as BRAINLEAST

Discussion

18.	1watt = how many jouls
Answer» Answer: WATTS are defined as 1 Watt = 1 Joule per second (1W = 1 J/s) which MEANS that 1 KW = 1000 J/s

18.

1watt = how many jouls

Answer»

Answer:

WATTS are defined as 1 Watt = 1 Joule per second (1W = 1 J/s) which MEANS that 1 KW = 1000 J/s

Discussion

19.	Explain the construction and workingof the follwoing. Draw a neat diagramand label it. GO THROUGHa. Electric motorb. Electric Generator(AC)
Answer» An electric motor is a device which converts electrical energy into mechanical energy. Electric MOTORS and their functions: A power supply – In general, a simple motor has a DC power source. It PROVIDES power for the armature of the motor or field coils. ... Armature Coil – Supporting the engine to run. An AC generation is an electric generation that converts mechanical energy into electrical energy in form of alternative emf or alternating current it WORKS as the principals of Electromagnetic Inductor working of an generator: Whne the armature rotate between the poles of the magnet an axis perpendicular to the magnetic field the FLUX which links with the armature changes continuously Due to this on emf is induced in the armature This produces on electric current through galvanometer & the slip rings & brushes. The galvanometer rings between the POSITIVE & negative values This indicates that there's is an alternating current flowing through the galvanometer.

19.

Explain the construction and workingof the follwoing. Draw a neat diagramand label it. GO THROUGHa. Electric motorb. Electric Generator(AC)

Answer»

An electric motor is a device which converts electrical energy into mechanical energy. Electric MOTORS and their functions: A power supply – In general, a simple motor has a DC power source. It PROVIDES power for the armature of the motor or field coils. ... Armature Coil – Supporting the engine to run.

An AC generation is an electric generation that converts mechanical energy

into electrical energy in form of alternative emf or alternating current it WORKS as the principals of Electromagnetic Inductor

working of an generator: Whne the armature rotate between the poles of the magnet an axis perpendicular to the magnetic field the FLUX which links with the armature changes continuously Due to this on emf is induced in the armature This produces on electric current through galvanometer & the slip rings & brushes.

The galvanometer rings between the POSITIVE & negative values This indicates that there's is an alternating current flowing through the galvanometer.

Discussion

20.	Chenpourwrite the ualeelements:nalency of thefollowingHyoruegen Catomic number 1)
Answer» EXPLANATION: mhzhjtsyrq5iejyqly4pstwlud85qkyeitwludita96d

20.

Chenpourwrite the ualeelements:nalency of thefollowingHyoruegen Catomic number 1)

Answer»

EXPLANATION:

mhzhjtsyrq5iejyqly4pstwlud85qkyeitwludita96d

Discussion

21.	14. The resultant of two forces each equal to P and acting at right angles is(6) P/2(a) P/2(c) P/22(d) V2Pspectively
Answer» ANSWER: p/22 HOPE it HELP MARK as BRAINLIEST hope it help mark as brainliest hope it help mark as brainliest hope it help mark as brainliest hope it help mark as brainliest hope it help mark as brainliest hope

21.

14. The resultant of two forces each equal to P and acting at right angles is(6) P/2(a) P/2(c) P/22(d) V2Pspectively

Answer»

ANSWER:

p/22

HOPE it HELP MARK as BRAINLIEST hope it help mark as brainliest hope it help mark as brainliest hope it help mark as brainliest hope it help mark as brainliest hope it help mark as brainliest hope

Discussion

22.	Name its main parts and state their functions.State three uses of a vernier callipers.Name the two scales of a vernier callipers anexplain, how it is used to measure a length correup to 0-01 cm.Describe in steps, how would you use a vernicallipers to measure the length of a small rod ?Name the part of the vernier callipers which is usto measure the following:(a) external diameter of a tube,(b) internal diameter of a mug,
Answer» Answer: trts and state their functions. State THREE uses of a vernier callipers. NAME the two scales of a vernier callipers an explain, how it is used to measure a length corre up to 0-01 cm. Describe in steps, how WOULD you use a verni callipers to measure the length of a small ROD ? Name the part of the vernier callipers which is U

22.

Name its main parts and state their functions.State three uses of a vernier callipers.Name the two scales of a vernier callipers anexplain, how it is used to measure a length correup to 0-01 cm.Describe in steps, how would you use a vernicallipers to measure the length of a small rod ?Name the part of the vernier callipers which is usto measure the following:(a) external diameter of a tube,(b) internal diameter of a mug,

Answer»

Answer:

trts and state their functions.

State THREE uses of a vernier callipers.

NAME the two scales of a vernier callipers an

explain, how it is used to measure a length corre

up to 0-01 cm.

Describe in steps, how WOULD you use a verni

callipers to measure the length of a small ROD ?

Name the part of the vernier callipers which is U

Discussion

23.	In an uniform motion graph, time = 6 seconds, find the distance and speed
Answer» ANSWER:When the body MOVES with a uniform velocity i.e., it does not change its speed or DIRECTION over the travel, the relation of distance and TIME is PROPORTIONAL, that is distance travelled remains proportional with the time.

23.

In an uniform motion graph, time = 6 seconds, find the distance and speed

Answer»

ANSWER:When the body MOVES with a uniform velocity i.e., it does not change its speed or DIRECTION over the travel, the relation of distance and TIME is PROPORTIONAL, that is distance travelled remains proportional with the time.

Discussion

24.	At what position the velocity of particle is minimum performing Vertical circular motion?
Answer» Explanation: Explanation: The minimum or critical speed is given by vcritical=√rg . This is the point where the NORMAL (or tension, frictional, ETC.) force is 0 and the only thing keeping the object in (CIRCULAR) MOTION is the force of gravity.

24.

At what position the velocity of particle is minimum performing Vertical circular motion?

Answer»

Explanation:

Explanation: The minimum or critical speed is given by vcritical=√rg . This is the point where the NORMAL (or tension, frictional, ETC.) force is 0 and the only thing keeping the object in (CIRCULAR) MOTION is the force of gravity.

Discussion

25.	Properties of vector sutraction? atleast five
Answer» Answer: *MARK* ME AS BRILLIANT AND LIKE AND *FOLLOW Explanation:* Properties 1..Vector subtraction is a non-commutative OPERATION. If you can reverse the ORDER you will not get the same result. 2..The only vector EQUAL to its own negative is the zero vector and the sum of a vector with its negative is the zero vector,

25.

Properties of vector sutraction? atleast five

Answer»

Answer:

MARK ME AS BRILLIANT AND LIKE AND FOLLOW

Explanation:

Properties

1..Vector subtraction is a non-commutative OPERATION. If you can reverse the ORDER you will not get the same result.

2..The only vector EQUAL to its own negative is the zero vector and the sum of a vector with its negative is the zero vector,

Discussion

26.	If more than one resistor is connected in series which does not change?
Answer» ANSWER: CURRENT does not CHANGE.

26.

If more than one resistor is connected in series which does not change?

Answer»

ANSWER:

CURRENT does not CHANGE.

Discussion

27.	A cyclist completes full round of a circular track of radius 318 m in 1.5 min, Find its speed and velocity? Plz answer this in steps, it would help me a lot
Answer» Given: A cyclist completes full round of a circular TRACK of radius 318 m in 1.5 min. To find: SPEED and Velocity of cyclist. Calculation: Speed is DEFINED as the total distance divided by the time TAKEN to cover that distance. $\rm{speed = \dfrac{distance}{time} }$ $= > \rm{speed = \dfrac{2\pi r}{t} }$ $= > \rm{speed = \dfrac{2\pi (318)}{1.5 \times 60} }$ $\boxed{ = > \rm{speed = 22.2 \: m {s}^{ - 1} }}$ Velocity is defined as the total Displacement divided by the time taken to cover the specific Displacement. Here Displacement is zero , because the cyclist starts and stops at the same point. $\rm{velocity = \dfrac{displacement}{time} }$ $= > \rm{velocity = \dfrac{0}{1.5 \times 60} }$ $\boxed{ = > \rm{velocity = 0 \: m {s}^{ - 1} }}$ Hope It Helps.

27.

A cyclist completes full round of a circular track of radius 318 m in 1.5 min, Find its speed and velocity? Plz answer this in steps, it would help me a lot

Answer»

Given:

A cyclist completes full round of a circular TRACK of radius 318 m in 1.5 min.

To find:

SPEED and Velocity of cyclist.

Calculation:

Speed is DEFINED as the total distance divided by the time TAKEN to cover that distance.

$\rm{speed = \dfrac{distance}{time} }$

$= > \rm{speed = \dfrac{2\pi r}{t} }$

$= > \rm{speed = \dfrac{2\pi (318)}{1.5 \times 60} }$

$\boxed{ = > \rm{speed = 22.2 \: m {s}^{ - 1} }}$

Velocity is defined as the total Displacement divided by the time taken to cover the specific Displacement.

Here Displacement is zero , because the cyclist starts and stops at the same point.

$\rm{velocity = \dfrac{displacement}{time} }$

$= > \rm{velocity = \dfrac{0}{1.5 \times 60} }$

$\boxed{ = > \rm{velocity = 0 \: m {s}^{ - 1} }}$

Hope It Helps.

Discussion

28.	What do you mean by dopler effect?
Answer» Answer: Doppler EFFECT refers to the change in wave FREQUENCY during the relative motion between a wave source and its observer. For instance, when a sound object MOVES TOWARDS you, the frequency of the sound waves increases, leading to a HIGHER pitch.

28.

What do you mean by dopler effect?

Answer»

Answer:

Doppler EFFECT refers to the change in wave FREQUENCY during the relative motion between a wave source and its observer. For instance, when a sound object MOVES TOWARDS you, the frequency of the sound waves increases, leading to a HIGHER pitch.

Discussion

29.	In the system shown in figure all the surface ofcontact are smooth, and string and pulley are light and the pulley is frictionless. When system is released from rest it was found that the acceleration of M comes out to be a0. Given the ratio of = 2 Mm , find a0.
Answer» Don't know but PLEASE mark me as brainliest Please Please May your PARENTS LIVE more than 100 YEARS

29.

In the system shown in figure all the surface ofcontact are smooth, and string and pulley are light and the pulley is frictionless. When system is released from rest it was found that the acceleration of M comes out to be a0. Given the ratio of = 2 Mm , find a0.

Answer»

Don't know but PLEASE mark me as brainliest

Please Please

May your PARENTS LIVE more than 100 YEARS

Discussion

30.	Wouldthe outputcharacteristic of common baseconfiguration be affectedwhen Vcb increase and show by PNP transistor
Answer» ANSWER: HEY buddy Explanation: don't UNDERSTAND your QUESTION FOLLOW me......now

30.

Wouldthe outputcharacteristic of common baseconfiguration be affectedwhen Vcb increase and show by PNP transistor

Answer»

ANSWER:

HEY buddy

Explanation:

don't UNDERSTAND your QUESTION

FOLLOW me......now

Discussion

31.	What is internal energy of a water molecule?1) 3RT2) 5RT3) 7RT4) 9RT
Answer» Answer: Since the system has CONSTANT volume (ΔV=0) the term -PΔV=0 and work is EQUAL to ZERO. Thus, in the equation ΔU=q+w w=0 and ΔU=q. The internal ENERGY is equal to the HEAT of the system.

31.

What is internal energy of a water molecule?1) 3RT2) 5RT3) 7RT4) 9RT

Answer»

Answer:

Since the system has CONSTANT volume (ΔV=0) the term -PΔV=0 and work is EQUAL to ZERO. Thus, in the equation ΔU=q+w w=0 and ΔU=q. The internal ENERGY is equal to the HEAT of the system.

Discussion

32.	Magnetic magnetic compass act on the principle of
Answer» ANSWER: MAGNETIC EFFECT of CURRENT

32.

Magnetic magnetic compass act on the principle of

Answer»

ANSWER:

MAGNETIC EFFECT of CURRENT

Discussion

33.	Represent a force of 50 N graphically towards North-West. Also mention the scale you choose.
Answer» To DRAW: A force of 50 N graphically TOWARDS North-West. Graph: $\boxed{\setlength{\unitlength}{1cm}\begin{picture}(6,6)\put(3,3){\vector(1,0){3}}\put(3,3){\vector(-1,0){3}}\put(3,3){\vector(0,1){3}}\put(3,3){\vector(0,-1){3}}\put(3,3){\vector(-1,1){1}}\put(1.5,4.25){50\:N}\put(3.25,5.75){N}\put(3.25,0){S}\put(5.75,3.25){E}\put(0,3.25){W}\end{picture}}$ Solution: First we need to draw the co-ordinate axes. Then, we SHALL CHOOSE the scale 50N as 1 cm on the graph. Measure 45° on the 2nd Quadrant using a Protractor or a compass and draw the line. Then using scale or compass , cut a length of 1 cm on the line on the 2nd quadrant. Put an arrow towards N-W direction. Hence , the required vector will be 50N towards N-W direction. Hope It Helps.

33.

Represent a force of 50 N graphically towards North-West. Also mention the scale you choose.

Answer»

To DRAW:

A force of 50 N graphically TOWARDS North-West.

Graph:

$\boxed{\setlength{\unitlength}{1cm}\begin{picture}(6,6)\put(3,3){\vector(1,0){3}}\put(3,3){\vector(-1,0){3}}\put(3,3){\vector(0,1){3}}\put(3,3){\vector(0,-1){3}}\put(3,3){\vector(-1,1){1}}\put(1.5,4.25){50\:N}\put(3.25,5.75){N}\put(3.25,0){S}\put(5.75,3.25){E}\put(0,3.25){W}\end{picture}}$

Solution:

First we need to draw the co-ordinate axes.

Then, we SHALL CHOOSE the scale 50N as 1 cm on the graph.

Measure 45° on the 2nd Quadrant using a Protractor or a compass and draw the line.

Then using scale or compass , cut a length of 1 cm on the line on the 2nd quadrant.

Put an arrow towards N-W direction.

Hence , the required vector will be 50N towards N-W direction.

Hope It Helps.

Discussion

34.	Raju observed the breaking of glass bottle which is filled completely with water with lid fitted tightly and kept in refrigerator for few hours. The reason for breaking isA) Glass bottle breaks due to the fall in temperature.B) The volume is increased when water converted into ice.C) The glass breaks at low temperatures.D) The volume decreased when converted into ice.
Answer» ANSWER: SORRY GIVE me some TIME OKK

34.

Raju observed the breaking of glass bottle which is filled completely with water with lid fitted tightly and kept in refrigerator for few hours. The reason for breaking isA) Glass bottle breaks due to the fall in temperature.B) The volume is increased when water converted into ice.C) The glass breaks at low temperatures.D) The volume decreased when converted into ice.

Answer»

ANSWER:

SORRY GIVE me some TIME OKK

Discussion

35.	What is vector quantity. What is moment
Answer» Answer: MOMENT of INERTIA is the property where BODY resists change in its state of rotatory motion. Inertia is a measure of mass so it is scalar quantity. But an object in rotatory motion will change its DIRECTION every point to point . Hence it is also vector quantity.

35.

What is vector quantity. What is moment

Answer»

Answer:

MOMENT of INERTIA is the property where BODY resists change in its state of rotatory motion. Inertia is a measure of mass so it is scalar quantity. But an object in rotatory motion will change its DIRECTION every point to point . Hence it is also vector quantity.

Discussion

36.	Explosion of a bomb produces heat and light
Answer» Answer: Hola Here is your answer mate______☺️ A nuclear emergency involves the explosion of a nuclear weapon or improvised nuclear device (IND). The explosion produces an INTENSE pulse of HEAT, light, air pressure, and radiation. Nuclear explosions PRODUCE FALLOUT (radioactive materials that can be carried LONG distances by the wind). Hope it helps you _____✌️✌️✌️______ Please follow me

36.

Explosion of a bomb produces heat and light

Answer»

Answer:

Hola

Here is your answer mate______☺️

A nuclear emergency involves the explosion of a nuclear weapon or improvised nuclear device (IND). The explosion produces an INTENSE pulse of HEAT, light, air pressure, and radiation. Nuclear explosions PRODUCE FALLOUT (radioactive materials that can be carried LONG distances by the wind).

Hope it helps you

_____✌️✌️✌️______

Please follow me

Discussion

37.	5 kg and 10 kg. Which one would require a lerge force to move it from the state of rest and why
Answer» Answer: 5kg HOPE it HELP MARK as BRAINLIEST hope

37.

5 kg and 10 kg. Which one would require a lerge force to move it from the state of rest and why

Answer»

Answer:

5kg

HOPE it HELP MARK as BRAINLIEST hope

Discussion

38.	A weak atom with k has 2 electorns inorbitatomic numberelement. Write thethe ionofsignal of the ion generated after removingthe atom2 electrons from the M cells ofof elements., atom in orbit two in cell M. Remove
Answer» Answer: 4 hope it HELP MARK as BRAINLIEST

38.

A weak atom with k has 2 electorns inorbitatomic numberelement. Write thethe ionofsignal of the ion generated after removingthe atom2 electrons from the M cells ofof elements., atom in orbit two in cell M. Remove

Answer»

Answer:

4

hope it HELP MARK as BRAINLIEST

Discussion

39.	A body is projected with an initial velocity 20m/s at 60degree to the horizontal. its velocity after 1 second in the form of vectors is
Answer» Answer: V = 10 i + 7.32 j Given : ⇒ u = 20 m/s ⇒ angle with HORIZONTAL = α = 60° To Find : velocity after 1 second , V = ? Solution : *At the place of projection ,* $u_{x} = 20 cos 60$ = 20 × 1/2 = 10 m/s $u_{y} = 20sin60$ = 20 × $\sqrt{3} /2$ = 10 $\sqrt{3}$ m /s *After 1 second ,* $v_{x} = 10m/s$ [ because x component of velocity remains same ] $v_{y} = u_{y} + a_{y} .t$ $v_{y}$ = 10 $\sqrt{3}$ - 10 $v_{y}$ = 10 ( $\sqrt{3}$ - 1 ) $v_{y}$ = 10 × 0.732 $v_{y}$ = 7.32 m/s so , V in the form of VECTORS = V = 10 i + 7.32 j

39.

A body is projected with an initial velocity 20m/s at 60degree to the horizontal. its velocity after 1 second in the form of vectors is

Answer»

Answer:

V = 10 i + 7.32 j

Given :

⇒ u = 20 m/s

⇒ angle with HORIZONTAL = α = 60°

To Find :

velocity after 1 second , V = ?

Solution :

At the place of projection ,

$u_{x} = 20 cos 60$

= 20 × 1/2

= 10 m/s

$u_{y} = 20sin60$

= 20 × $\sqrt{3} /2$

= 10 $\sqrt{3}$ m /s

After 1 second ,

$v_{x} = 10m/s$ [ because x component of velocity remains same ]

$v_{y} = u_{y} + a_{y} .t$

$v_{y}$ = 10 $\sqrt{3}$ - 10

$v_{y}$ = 10 ( $\sqrt{3}$ - 1 )

$v_{y}$ = 10 × 0.732

$v_{y}$ = 7.32 m/s

so , V in the form of VECTORS =

V = 10 i + 7.32 j

Discussion

40.	Ballet dancer, diving swimming pool 1 point these examples are related to which phenomenon (law)?
Answer» ANSWER: this is ASSOCIATIVE LAW of pronoun. Explanation: have a NICE day thanks DEAR.

40.

Ballet dancer, diving swimming pool 1 point these examples are related to which phenomenon (law)?

Answer»

ANSWER:

this is ASSOCIATIVE LAW of pronoun.

Explanation:

have a NICE day

thanks DEAR.

Discussion

41.	Impact of force produced by an object depends onoptions are:only massonly velocity mass and acceleration mass and time
Answer» ANSWER: MASS .....................

41.

Impact of force produced by an object depends onoptions are:only massonly velocity mass and acceleration mass and time

Answer»

ANSWER:

MASS .....................

Discussion

42.	Explain why the value of acceleration due to gravity varies on the earth's surface,below the earth's surface and above the earth's surface.
Answer» EXPLANATION: Variation of g due to Shape of Earth As the earth is an oblate spheroid, its RADIUS near the equator is more than its radius near poles. SINCE for a SOURCE mass, the acceleration due to gravity is inversely proportional to the square of the radius of the earth, it varies with latitude due to the shape of the earth.

42.

Explain why the value of acceleration due to gravity varies on the earth's surface,below the earth's surface and above the earth's surface.

Answer»

EXPLANATION:

Variation of g due to Shape of Earth

As the earth is an oblate spheroid, its RADIUS near the equator is more than its radius near poles. SINCE for a SOURCE mass, the acceleration due to gravity is inversely proportional to the square of the radius of the earth, it varies with latitude due to the shape of the earth.

Discussion

43.	D Quadrupicute videtA) 300 °CC) 573 °CB) 423 °CD) 600 °Cnc89. The volume of a given mass of gas will be doubled at atmospheric pressure if thetemperature of the gas is changed from 150 °C to
Answer» Answer: 573°c hope it HELP MARK as BRAINLIEST

43.

D Quadrupicute videtA) 300 °CC) 573 °CB) 423 °CD) 600 °Cnc89. The volume of a given mass of gas will be doubled at atmospheric pressure if thetemperature of the gas is changed from 150 °C to

Answer»

Answer:

573°c

hope it HELP MARK as BRAINLIEST

Discussion

44.	A vector of magnitude 10 units makes an angle of 30 degree with x axis and taxis ?
Answer» Answer: 300 hope it HELP MARK as BRAINLIEST

44.

A vector of magnitude 10 units makes an angle of 30 degree with x axis and taxis ?

Answer»

Answer:

300

hope it HELP MARK as BRAINLIEST

Discussion

45.	09calculate the total displacement fromno to40720 +0401020
Answer» ANSWER: displacement = final POSITION - initial position = 407 - 20 = 387

45.

09calculate the total displacement fromno to40720 +0401020

Answer»

ANSWER:

displacement = final POSITION - initial position

= 407 - 20

= 387

Discussion

46.	La) a vemier callipers with scale,classmateDatePageWhat doyou understand by the dimesionsof a physical quantity ?the principle of homogeneity ofdimesions, geving an examplerExplo'm
Answer» ANSWER: do yourself and MAKE me BRAINLIEST

46.

La) a vemier callipers with scale,classmateDatePageWhat doyou understand by the dimesionsof a physical quantity ?the principle of homogeneity ofdimesions, geving an examplerExplo'm

Answer»

ANSWER:

do yourself and MAKE me BRAINLIEST

Discussion

47.	A car in motion can exhibit which types of motion? Identify and explain in two lines which part of the car exhibits circular motion, linear motion, rotatory and vibratory motion?
Answer» ANSWER: VIBRATORY motion Explanation: PLEASE MARK as BRAINLIST

47.

A car in motion can exhibit which types of motion? Identify and explain in two lines which part of the car exhibits circular motion, linear motion, rotatory and vibratory motion?

Answer»

ANSWER:

VIBRATORY motion

Explanation:

PLEASE MARK as BRAINLIST

Discussion

48.	Calculate length of seconds pendulum at a place where g= 9.78 m/s^2(meter/ second square).
Answer» Answer: $\boxed{\sf <klux>LENGTH</klux> \ of \ seconds \ pendulum \ (<klux>L</klux>) = 0.99 \ m \approx 1 \ m}$ Given: Acceleration due to GRAVITY (g) = 9.78 m/s² To Find: Length of seconds pendulum (l) EXPLANATION: Time period (T) for one oscillation in seconds pendulum is 2 seconds. $\sf \implies T = 2 \ s$ Formula: $\boxed{ \bold{ \sf T = 2\pi \sqrt{ \frac{l}{g} } }}$ $\sf \implies l = \frac{T ^{2} g}{4 {\pi}^{2} }$ Substituting values of T & g in the equation: $\sf \implies l = \frac{ {2}^{2} \times 9.78 }{4 \times3.14 ^{2} }$ $\sf \implies l = \frac{ \cancel{4} \times 9.78}{ \cancel{4} \times 9.8596}$ $\sf \implies l = \frac{ 9.78}{ 9.8596}$ $\sf \implies l = 0.99 \: m \approx 1 \: m$ $\therefore$ Length of seconds pendulum (l) = 0.99 m ≈ 1 m

48.

Calculate length of seconds pendulum at a place where g= 9.78 m/s^2(meter/ second square).

Answer»

Answer:

$\boxed{\sf <klux>LENGTH</klux> \ of \ seconds \ pendulum \ (<klux>L</klux>) = 0.99 \ m \approx 1 \ m}$

Given:

Acceleration due to GRAVITY (g) = 9.78 m/s²

To Find:

Length of seconds pendulum (l)

EXPLANATION:

Time period (T) for one oscillation in seconds pendulum is 2 seconds.

$\sf \implies T = 2 \ s$

Formula:

$\boxed{ \bold{ \sf T = 2\pi \sqrt{ \frac{l}{g} } }}$

$\sf \implies l = \frac{T ^{2} g}{4 {\pi}^{2} }$

Substituting values of T & g in the equation:

$\sf \implies l = \frac{ {2}^{2} \times 9.78 }{4 \times3.14 ^{2} }$

$\sf \implies l = \frac{ \cancel{4} \times 9.78}{ \cancel{4} \times 9.8596}$

$\sf \implies l = \frac{ 9.78}{ 9.8596}$

$\sf \implies l = 0.99 \: m \approx 1 \: m$

$\therefore$

Length of seconds pendulum (l) = 0.99 m ≈ 1 m

Discussion

49.	Radiocarbon dating is done by estimating in the speciman
Answer» EXPLANATION: Radiocarbon dating is a method that provides objective age estimates for carbon-based materials that originated from living organisms. An age could be estimated by MEASURING the amount of carbon-14 present in the SAMPLE and comparing this against an INTERNATIONALLY used reference standard. plz mark as brainlist

49.

Radiocarbon dating is done by estimating in the speciman

Answer»

EXPLANATION:

Radiocarbon dating is a method that provides objective age estimates for carbon-based materials that originated from living organisms. An age could be

estimated by MEASURING the amount of carbon-14 present in the SAMPLE and comparing this against an INTERNATIONALLY used reference standard.

plz mark as brainlist

Discussion

50.	It is necessary to balance chemical equation in order to satisfy the law of:Conservation of motionConservation of momentumConservation of energyConservation of mass
Answer» $\LARGE{ \underline{ \tt{ \blue{Required \: answer:}}}}$ In every chemical equation, the amount of each substance that is element, is always conserved. ACCORDING to law of conservation of mass and Dalton's atomic theory, the mass and electric charge remains conserved or constant. So, To MAKE a balanced equation, we need to add some stoichiometric coefficients in order to satisfy law of conservation of mass. Option (D) Explore more !! WHENEVER there is an chemical reaction due to chemical change, a series of steps are involved which are represented by Chemical equation. It can be written in two ways: WORD equation Symbol equation (Balanced & Unbalanced chemical equation). And rules for writing chemical equation: The left hand SIDE substances are known a reactants and the right hand side substances are known as products. They are added in each side with a (+) sign. The arrow ( $\longrightarrow$ ) is put between the reactants and products which shows its direction. ━━━━━━━━━━━━━━━━━━━━━━━━━━

50.

It is necessary to balance chemical equation in order to satisfy the law of:Conservation of motionConservation of momentumConservation of energyConservation of mass

Answer»

$\LARGE{ \underline{ \tt{ \blue{Required \: answer:}}}}$

In every chemical equation, the amount of each substance that is element, is always conserved. ACCORDING to law of conservation of mass and Dalton's atomic theory, the mass and electric charge remains conserved or constant.

So, To MAKE a balanced equation, we need to add some stoichiometric coefficients in order to satisfy law of conservation of mass. Option (D)

Explore more !!

WHENEVER there is an chemical reaction due to chemical change, a series of steps are involved which are represented by Chemical equation. It can be written in two ways:

WORD equation
Symbol equation (Balanced & Unbalanced chemical equation).

And rules for writing chemical equation:

The left hand SIDE substances are known a reactants and the right hand side substances are known as products.
They are added in each side with a (+) sign.
The arrow ( $\longrightarrow$ ) is put between the reactants and products which shows its direction.

━━━━━━━━━━━━━━━━━━━━━━━━━━

Discussion

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