13232 + Interview Questions in Physics Page 58 InterviewSolution

2851.	An object moves 8 m East and then 6 m North in 10 s. Find the average speed and average velocity of the object respectively.
Answer» An object moves $8 m$ East and then $6 m$ North in $10 s$ . Find the average speed and average velocity of the object respectively.

Discussion

2852.	A bullet moving with a velocity of 100m/s can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet when the velocity is doubled would be?
Answer» A bullet moving with a velocity of 100m/s can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet when the velocity is doubled would be?

Discussion

2853.	Is average velocity zero or non zero in uniform circular motion
Answer» Is average velocity zero or non zero in uniform circular motion

Discussion

2854.	A satellite revolves in an elliptical orbit around a planet of mass M and Its time period is T and M is at the centee of the path. The length of the major axis of the is (neglect the gravitational effect of the other objects in space d
Answer» A satellite revolves in an elliptical orbit around a planet of mass M and Its time period is T and M is at the centee of the path. The length of the major axis of the is (neglect the gravitational effect of the other objects in space d

Discussion

2855.	an object ossicilates simple harmonically with time period T. find time taken to complete 7/8 oscillations
Answer» an object ossicilates simple harmonically with time period T. find time taken to complete 7/8 oscillations

Discussion

2856.	equation of trajectory is equal to vertical height. it is true or false and also explains it
Answer» equation of trajectory is equal to vertical height. it is true or false and also explains it

Discussion

2857.	A force 1200N act on surface area 10cm2, Pressure?
Answer» A force 1200N act on surface area 10cm2, Pressure?

Discussion

2858.	3 As shown in figure below, a liquid of refractive indexn, is poured into the concave surface of a concavo-convex lens. R1and R2are the radii of curvature ofconvex and concave surfaces of lens respectivelyand R1= 2R2, The refractive index of material of lensis n,. For which combination of n1 and n2 the wholesystem behave as a diverging lens
Answer» 3 As shown in figure below, a liquid of refractive indexn, is poured into the concave surface of a concavo-convex lens. R1and R2are the radii of curvature ofconvex and concave surfaces of lens respectivelyand R1= 2R2, The refractive index of material of lensis n,. For which combination of n1 and n2 the wholesystem behave as a diverging lens

Discussion

2859.	A rocket is fired vertically with a speed of 5 kms−1 from the earth's surface. How far from the earth does the rocket go before returning to the earth? Mass of the earth =6.0×1024 kg; mean radius of the earth =6.4×106 m; G=6.67×10−11 Nm2kg−2
Answer» A rocket is fired vertically with a speed of 5 $k m s^{- 1}$ from the earth's surface. How far from the earth does the rocket go before returning to the earth? Mass of the earth $= 6.0 \times 10^{24} k g$ ; mean radius of the earth $= 6.4 \times 10^{6} m$ ; $G = 6.67 \times 10^{- 11} N m^{2} k g^{- 2}$

Discussion

2860.	Which of the statements is/are true regarding gamma radiation?
Answer» Which of the statements is/are true regarding gamma radiation?

Discussion

2861.	27. two metallic spheres of radii 1 cm and 2 cm are given charges 10 to the power minus 2 coulomb and 5 into 10 to the power minus 2 coulomb respectively if they are connected by a connecting wires then the final charge on the smaller sphere is
Answer» 27. two metallic spheres of radii 1 cm and 2 cm are given charges 10 to the power minus 2 coulomb and 5 into 10 to the power minus 2 coulomb respectively if they are connected by a connecting wires then the final charge on the smaller sphere is

Discussion

2862.	Have you ever experienced that the train in which you are sitting appears to move while it is at rest? How , why what is the reason?
Answer» Have you ever experienced that the train in which you are sitting appears to move while it is at rest? How , why what is the reason?

Discussion

2863.	The velocity – time graph for two bodies A and B are shown. Then the acceleration of A and B are in the ratio
Answer» The velocity – time graph for two bodies A and B are shown. Then the acceleration of A and B are in the ratio

2863.

The velocity – time graph for two bodies A and B are shown. Then the acceleration of A and B are in the ratio

Answer»

The velocity – time graph for two bodies A and B are shown. Then the acceleration of A and B are in the ratio

Discussion

2864.	The functional unit of biosphere which plays a major role in balancing and maintaining equilibrium in nature is ____.
Answer» The functional unit of biosphere which plays a major role in balancing and maintaining equilibrium in nature is ____.

Discussion

2865.	Draw a ray diagram to show the path of the refracted ray corresponding to an incident ray of light parallel to the principal axis of convex mirror and show the angle of incidence and angle of reflection on it.
Answer» Draw a ray diagram to show the path of the refracted ray corresponding to an incident ray of light parallel to the principal axis of convex mirror and show the angle of incidence and angle of reflection on it.

Discussion

2866.	Name the S.I. unit of force and define it.
Answer» Name the S.I. unit of force and define it.

Discussion

2867.	Young's double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly
Answer» Young's double slit experiment is first performed in air and then in a medium other than air. It is found that $8^{t h}$ bright fringe in the medium lies where $5^{t h}$ dark fringe lies in air. The refractive index of the medium is nearly

Discussion

2868.	what will happen if total energy of satellite becomes zero??
Answer» what will happen if total energy of satellite becomes zero??

Discussion

2869.	The materials that resist the flow of electric current are called_________.
Answer» The materials that resist the flow of electric current are called_________.

Discussion

2870.	4. In a uniform electric field, the potential is 10 V at theorigin of coordinates, and 8 V at each of the point(1, 0, 0), (0, 1,0) and (0, 0, 1). The potential at the poin(1, 1, 1) will be(a) 0(c) 8V(b) 4V(d) 10 V
Answer» 4. In a uniform electric field, the potential is 10 V at theorigin of coordinates, and 8 V at each of the point(1, 0, 0), (0, 1,0) and (0, 0, 1). The potential at the poin(1, 1, 1) will be(a) 0(c) 8V(b) 4V(d) 10 V

Discussion

2871.	13. A horizontal force of 200 N pulls two masses 4 kgand 6 kg (lying on a frictionless surface) connectedby a light string. T is the tension in stringconnected between them when pull is applied on4 kg block. If the pull is applied on 6 kg blockinstead of 4 kg block, then tension in the string willbe4T2T(2)3337(3)(4) T
Answer» 13. A horizontal force of 200 N pulls two masses 4 kg and 6 kg (lying on a frictionless surface) connected by a light string. T is the tension in string connected between them when pull is applied on 4 kg block. If the pull is applied on 6 kg block instead of 4 kg block, then tension in the string will be 4T 2T (2) 3 3 37 (3) (4) T

Discussion

2872.	Two car la ferrari and mc Lauren p1 are having a competition for the highest speed. La ferrari can accelerate with 20 m/s^2 till 5 sec and mc Lauren with 17 m/s^2 upto 6 sec. Who wins?
Answer» Two car la ferrari and mc Lauren p1 are having a competition for the highest speed. La ferrari can accelerate with 20 m/s^2 till 5 sec and mc Lauren with 17 m/s^2 upto 6 sec. Who wins?

Discussion

2873.	a nearly massless rod is pivoted at one end so that it can swing freely as a pendulum.two masses 2m and m are attached to it at dis†an ce b and 3b respectively from the pivot.the rod is held horizontal and then released.the angular acceleration of the rod at the ins†an t it is released is
Answer» a nearly massless rod is pivoted at one end so that it can swing freely as a pendulum.two masses 2m and m are attached to it at dis†an ce b and 3b respectively from the pivot.the rod is held horizontal and then released.the angular acceleration of the rod at the ins†an t it is released is

Discussion

2874.	A ball of mass m hits the floor with a speed v making an angle of incidence q = 45° with the normal to the floor. If the coefficient of restitution e = 0.707 then the speed of the reflected ball and the angle of reflection are
Answer» A ball of mass m hits the floor with a speed v making an angle of incidence q = 45° with the normal to the floor. If the coefficient of restitution e = 0.707 then the speed of the reflected ball and the angle of reflection are

Discussion

2875.	Two resistors of resistor 2Ω and 5Ω are connected in series with a 7v battery.
Answer» Two resistors of resistor 2Ω and 5Ω are connected in series with a 7v battery.

2875.

Two resistors of resistor 2Ω and 5Ω are connected in series with a 7v battery.

Answer»

Two resistors of resistor 2Ω and 5Ω are connected in series with a 7v battery.

Discussion

2876.	A particle in seen at x=0 at t=0. The acceleration of the particle depends on time as acceleration = (2m/s^3)t + (1m/s^2)along x axis Then If the particle is at rest at the origin at moment t= 0 sec,then t=6sec it's velocity will be ?
Answer» A particle in seen at x=0 at t=0. The acceleration of the particle depends on time as acceleration = (2m/s^3)t + (1m/s^2)along x axis Then If the particle is at rest at the origin at moment t= 0 sec,then t=6sec it's velocity will be ?

Discussion

2877.	Show that area under the velocity time curve of a body moving uniformly gives the displacement of the particle in a given time.
Answer» Show that area under the velocity time curve of a body moving uniformly gives the displacement of the particle in a given time.

Discussion

2878.	A stationary man observed that the rain strike him at angle of 60 degree then he begins to move with a velocity of 25 m per second then the drops appear to strike him at an angle 30 degree with with the horizontal calculate the velocity of the raindrops
Answer» A stationary man observed that the rain strike him at angle of 60 degree then he begins to move with a velocity of 25 m per second then the drops appear to strike him at an angle 30 degree with with the horizontal calculate the velocity of the raindrops

Discussion

2879.	A student sets up an electric circuit shown here for finding the equivalent resistance of two resistors in series:In this circuit, the:(1) resistors have been connected correctly but the voltmeter has been wrongly connected(2) resistors have been connected correctly but the ammeter has been wrongly connected(3) resistors, as well as the voltmeter, have been wrongly connected(4) resistors, as well as the ammeter, have been wrongly connected
Answer» A student sets up an electric circuit shown here for finding the equivalent resistance of two resistors in series: In this circuit, the: (1) resistors have been connected correctly but the voltmeter has been wrongly connected (2) resistors have been connected correctly but the ammeter has been wrongly connected (3) resistors, as well as the voltmeter, have been wrongly connected (4) resistors, as well as the ammeter, have been wrongly connected

Discussion

2880.	The difference in the number of wavelengths, when yellow light propagates through air and vaccum columns of the same thickness is one. The thickness of the column is[Refractive index of air μair=1.0003, wavelength of yellow light in vaccum =6000 ˚A].
Answer» The difference in the number of wavelengths, when yellow light propagates through air and vaccum columns of the same thickness is one. The thickness of the column is [Refractive index of air $μ_{a i r} = 1.0003$ , wavelength of yellow light in vaccum $= 6000 ˚ A$ ].

Discussion

2881.	The displacement-time graph can never be a straight line parallel to x axis. Why?
Answer» The displacement-time graph can never be a straight line parallel to x axis. Why?

Discussion

2882.	A stone is projected vertically upward at t = 0 second from ground and collision betweenthe ground and the stone is perfectly elastic. The net displacement of stone between t0 second tot = T seconds is zero. The time of flight of stone is T. Pick up theINCORRECT statement.(A) From timet = T/4 second to t 3T/4 second, the average velocity is zero.(B) The change in velocity from time t = 0 to t = T/4 second is same as change invelocity fromt =T/8 second to t =3T/8 second.(C) The distance travelled from t = 0 to t = T/4 second is larger than the distancetravelled fromt = T/4 second to t =3T/4 second.(D) The distance traveled from t =T/2 second to t =3T/2 second is half the distance traveled from t = T/2 second to t =T second.
Answer» A stone is projected vertically upward at t = 0 second from ground and collision betweenthe ground and the stone is perfectly elastic. The net displacement of stone between t0 second tot = T seconds is zero. The time of flight of stone is T. Pick up theINCORRECT statement.(A) From timet = T/4 second to t 3T/4 second, the average velocity is zero.(B) The change in velocity from time t = 0 to t = T/4 second is same as change invelocity fromt =T/8 second to t =3T/8 second.(C) The distance travelled from t = 0 to t = T/4 second is larger than the distancetravelled fromt = T/4 second to t =3T/4 second.(D) The distance traveled from t =T/2 second to t =3T/2 second is half the distance traveled from t = T/2 second to t =T second.

Discussion

2883.	A body when immersed in kerosene, it sinks. What is the relationship between the densities of body and kerosene?
Answer» A body when immersed in kerosene, it sinks. What is the relationship between the densities of body and kerosene?

Discussion

2884.	What is the importance of pi in various fields of maths as well as science
Answer» What is the importance of pi in various fields of maths as well as science

Discussion

2885.	Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of equivalent resistance in series and parallel combinations would be:
Answer» Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of equivalent resistance in series and parallel combinations would be:

Discussion

2886.	22.HYDROGEN SPECTRUM GAVE A SERIES OF LINES AT 5R/36 , 3R/16 , 21R/100(R= RYDBERG CONSTANT IN CM^{-1}) THESE LINES BELONGS TO AND HOW SHOULD WE CALCULATE?
Answer» 22.HYDROGEN SPECTRUM GAVE A SERIES OF LINES AT 5R/36 , 3R/16 , 21R/100(R= RYDBERG CONSTANT IN CM^{-1}) THESE LINES BELONGS TO AND HOW SHOULD WE CALCULATE?

Discussion

2887.	A body is fully immersed in the water. What can increase of pressure exerted on the bottom surface of the body?
Answer» A body is fully immersed in the water. What can increase of pressure exerted on the bottom surface of the body?

Discussion

2888.	Same amount of force 10 N is acting on two bodies in two different ways. Case 1: Force is acting in the direction of displacement of the body. Case 2: Force is making an angle of 60° with the direction of displacement. If the displacement is 'd' meters in both the cases, then what is the relation between the work done in both the cases?
Answer» Same amount of force $10 N$ is acting on two bodies in two different ways. $C a s e 1 :$ Force is acting in the direction of displacement of the body. $C a s e 2 :$ Force is making an angle of 60° with the direction of displacement. If the displacement is 'd' meters in both the cases, then what is the relation between the work done in both the cases?

Discussion

2889.	Can frictional force cause acceleration in a body?
Answer» Can frictional force cause acceleration in a body?

Discussion

2890.	A heat engine absorbs heat Q1 at temperature T1 and heat Q2 at temperature T2.Work done by the engine is (Q1+Q2). How this data violates 2nd law of thermodynamics?
Answer» A heat engine absorbs heat Q1 at temperature T1 and heat Q2 at temperature T2.Work done by the engine is (Q1+Q2). How this data violates 2nd law of thermodynamics?

Discussion

2891.	If the time of fall of two objects are in the ratio 1:2. Find the ratio of the height from which they fall?
Answer» If the time of fall of two objects are in the ratio 1:2. Find the ratio of the height from which they fall?

Discussion

2892.	A horizontal force of 20 newton is required to keep a body moving in horizontal direction with constant velocity. What is the work done by the frictional force and the displacement of the body is 2 metre.
Answer» A horizontal force of 20 newton is required to keep a body moving in horizontal direction with constant velocity. What is the work done by the frictional force and the displacement of the body is 2 metre.

Discussion

2893.	The principle on which jet plane works is based on:
Answer» The principle on which jet plane works is based on:

Discussion

2894.	Define two kinds of inertia.support your answer with two example of each.
Answer» Define two kinds of inertia.support your answer with two example of each.

Discussion

2895.	Which of the following graphs between the square of the time period and cube of the distance of the planet from the sun is correct?
Answer» Which of the following graphs between the square of the time period and cube of the distance of the planet from the sun is correct?

Discussion

2896.	A cylinder of radius R is filled with water up to a height H,so that the thrust on wall is equal to that on the bottom.The height H and R are related as 1)H=R÷2 2)H=R 3)H=2R 4)H=R÷3
Answer» A cylinder of radius R is filled with water up to a height H,so that the thrust on wall is equal to that on the bottom.The height H and R are related as 1)H=R÷2 2)H=R 3)H=2R 4)H=R÷3

Discussion

2897.	Imagine a condition when all plants n animals food sources get depleted from the earth think n devise upon new ways of generating food from other sources and make a balanced diet of it
Answer» Imagine a condition when all plants n animals food sources get depleted from the earth think n devise upon new ways of generating food from other sources and make a balanced diet of it

Discussion

2898.	Matchthe words in the boxes with their explanation given below:a. Thisis the other word for trembling. _______________________________b. Thisis used for smile. ___________________________________________c. Youcall a person this if he/she has pale gold coloured hair.____________d. Thisis a quality which relates to high energy and noise. _______________e. This is related to dancing or moving in a way that involvesshaking young hips and shoulders.________________________________________________f. This is to express a tendency to show violent and wildbehaviour often causing damage.___________________________________________________g. Weuse it for a condition which is serious, uncertain and dangerous.________h. Thisis a state in which one is forced to stay in a closed space._____________i. Thisis a medical condition involving bleeding in the brain._______________j. Itis loud, deep shout to show anger. _________________________________k. Thisis a condition when the rope or leash is stretched tightly._____________
Answer» Match the words in the boxes with their explanation given below: a. This is the other word for trembling. _______________________________ b. This is used for smile. ___________________________________________ c. You call a person this if he/she has pale gold coloured hair. ____________ d. This is a quality which relates to high energy and noise. _______________ e. This is related to dancing or moving in a way that involves shaking young hips and shoulders. ________________________________________________ f. This is to express a tendency to show violent and wild behaviour often causing damage. ___________________________________________________ g. We use it for a condition which is serious, uncertain and dangerous. ________ h. This is a state in which one is forced to stay in a closed space. _____________ i. This is a medical condition involving bleeding in the brain. _______________ j. It is loud, deep shout to show anger. _________________________________ k. This is a condition when the rope or leash is stretched tightly. _____________

2898.

Matchthe words in the boxes with their explanation given below:a. Thisis the other word for trembling. _b. Thisis used for smile. _____c. Youcall a person this if he/she has pale gold coloured hair.d. Thisis a quality which relates to high energy and noise. _e. This is related to dancing or moving in a way that involvesshaking young hips and shoulders.f. This is to express a tendency to show violent and wildbehaviour often causing damage.___g. Weuse it for a condition which is serious, uncertain and dangerous.h. Thisis a state in which one is forced to stay in a closed space._i. Thisis a medical condition involving bleeding in the brain._j. Itis loud, deep shout to show anger. _____________k. Thisis a condition when the rope or leash is stretched tightly._

Answer»

Match
the words in the boxes with their explanation given below:

a. This
is the other word for trembling. _______________________________

b. This
is used for smile. ___________________________________________

c. You
call a person this if he/she has pale gold coloured hair.
____________

d. This
is a quality which relates to high energy and noise. _______________

e. This is related to dancing or moving in a way that involves
shaking young hips and shoulders.
________________________________________________

f. This is to express a tendency to show violent and wild
behaviour often causing damage.
___________________________________________________

g. We
use it for a condition which is serious, uncertain and dangerous.
________

h. This
is a state in which one is forced to stay in a closed space.
_____________

i. This
is a medical condition involving bleeding in the brain.
_______________

j. It
is loud, deep shout to show anger. _________________________________

k. This
is a condition when the rope or leash is stretched tightly.
_____________

Discussion

2899.	A motorcycle and a car start from the rest at same plane at the same time and travel in the same direction. The motorcycle accelerate at 1.0m/s up to a speed of 36km/h nad the car at 0.5m/s up to a speed of 54km/h . The time ay which the car would overtake the motorcycle is
Answer» A motorcycle and a car start from the rest at same plane at the same time and travel in the same direction. The motorcycle accelerate at 1.0m/s up to a speed of 36km/h nad the car at 0.5m/s up to a speed of 54km/h . The time ay which the car would overtake the motorcycle is

Discussion

2900.	Three balls a, b and c are kept in a straight line. The separation between a and c is 1 m and b is placed at the mid point between them. The masses of a, b and c are 100g, 200g and 300g respectively. Find the net gravitational force on a, b and c.
Answer» Three balls a, b and c are kept in a straight line. The separation between a and c is 1 m and b is placed at the mid point between them. The masses of a, b and c are 100g, 200g and 300g respectively. Find the net gravitational force on a, b and c.

Discussion

Explore topic-wise InterviewSolutions in .

An object moves 8 m East and then 6 m North in 10 s. Find the average speed and average velocity of the object respectively.

A bullet moving with a velocity of 100m/s can just penetrate two planks of equal thickness. The number of such planks penetrated by the same bullet when the velocity is doubled would be?

Is average velocity zero or non zero in uniform circular motion

A satellite revolves in an elliptical orbit around a planet of mass M and Its time period is T and M is at the centee of the path. The length of the major axis of the is (neglect the gravitational effect of the other objects in space d

an object ossicilates simple harmonically with time period T. find time taken to complete 7/8 oscillations

equation of trajectory is equal to vertical height. it is true or false and also explains it

A force 1200N act on surface area 10cm2, Pressure?

A rocket is fired vertically with a speed of 5 kms−1 from the earth's surface. How far from the earth does the rocket go before returning to the earth? Mass of the earth =6.0×1024 kg; mean radius of the earth =6.4×106 m; G=6.67×10−11 Nm2kg−2

Which of the statements is/are true regarding gamma radiation?

27. two metallic spheres of radii 1 cm and 2 cm are given charges 10 to the power minus 2 coulomb and 5 into 10 to the power minus 2 coulomb respectively if they are connected by a connecting wires then the final charge on the smaller sphere is

Have you ever experienced that the train in which you are sitting appears to move while it is at rest? How , why what is the reason?

The velocity – time graph for two bodies A and B are shown. Then the acceleration of A and B are in the ratio

The functional unit of biosphere which plays a major role in balancing and maintaining equilibrium in nature is ____.

Draw a ray diagram to show the path of the refracted ray corresponding to an incident ray of light parallel to the principal axis of convex mirror and show the angle of incidence and angle of reflection on it.

Name the S.I. unit of force and define it.

Young's double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly

what will happen if total energy of satellite becomes zero??

The materials that resist the flow of electric current are called_________.

4. In a uniform electric field, the potential is 10 V at theorigin of coordinates, and 8 V at each of the point(1, 0, 0), (0, 1,0) and (0, 0, 1). The potential at the poin(1, 1, 1) will be(a) 0(c) 8V(b) 4V(d) 10 V

Two car la ferrari and mc Lauren p1 are having a competition for the highest speed. La ferrari can accelerate with 20 m/s^2 till 5 sec and mc Lauren with 17 m/s^2 upto 6 sec. Who wins?

a nearly massless rod is pivoted at one end so that it can swing freely as a pendulum.two masses 2m and m are attached to it at dis†an ce b and 3b respectively from the pivot.the rod is held horizontal and then released.the angular acceleration of the rod at the ins†an t it is released is

A ball of mass m hits the floor with a speed v making an angle of incidence q = 45° with the normal to the floor. If the coefficient of restitution e = 0.707 then the speed of the reflected ball and the angle of reflection are

Two resistors of resistor 2Ω and 5Ω are connected in series with a 7v battery.

A particle in seen at x=0 at t=0. The acceleration of the particle depends on time as acceleration = (2m/s^3)t + (1m/s^2)along x axis Then If the particle is at rest at the origin at moment t= 0 sec,then t=6sec it's velocity will be ?

Show that area under the velocity time curve of a body moving uniformly gives the displacement of the particle in a given time.

A stationary man observed that the rain strike him at angle of 60 degree then he begins to move with a velocity of 25 m per second then the drops appear to strike him at an angle 30 degree with with the horizontal calculate the velocity of the raindrops

The difference in the number of wavelengths, when yellow light propagates through air and vaccum columns of the same thickness is one. The thickness of the column is[Refractive index of air μair=1.0003, wavelength of yellow light in vaccum =6000 ˚A].

The displacement-time graph can never be a straight line parallel to x axis. Why?

A body when immersed in kerosene, it sinks. What is the relationship between the densities of body and kerosene?

What is the importance of pi in various fields of maths as well as science

Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of equivalent resistance in series and parallel combinations would be:

22.HYDROGEN SPECTRUM GAVE A SERIES OF LINES AT 5R/36 , 3R/16 , 21R/100(R= RYDBERG CONSTANT IN CM^{-1}) THESE LINES BELONGS TO AND HOW SHOULD WE CALCULATE?

A body is fully immersed in the water. What can increase of pressure exerted on the bottom surface of the body?

Can frictional force cause acceleration in a body?

A heat engine absorbs heat Q1 at temperature T1 and heat Q2 at temperature T2.Work done by the engine is (Q1+Q2). How this data violates 2nd law of thermodynamics?

If the time of fall of two objects are in the ratio 1:2. Find the ratio of the height from which they fall?

A horizontal force of 20 newton is required to keep a body moving in horizontal direction with constant velocity. What is the work done by the frictional force and the displacement of the body is 2 metre.

The principle on which jet plane works is based on:

Define two kinds of inertia.support your answer with two example of each.

Which of the following graphs between the square of the time period and cube of the distance of the planet from the sun is correct?

A cylinder of radius R is filled with water up to a height H,so that the thrust on wall is equal to that on the bottom.The height H and R are related as 1)H=R÷2 2)H=R 3)H=2R 4)H=R÷3

Imagine a condition when all plants n animals food sources get depleted from the earth think n devise upon new ways of generating food from other sources and make a balanced diet of it

A motorcycle and a car start from the rest at same plane at the same time and travel in the same direction. The motorcycle accelerate at 1.0m/s up to a speed of 36km/h nad the car at 0.5m/s up to a speed of 54km/h . The time ay which the car would overtake the motorcycle is

Three balls a, b and c are kept in a straight line. The separation between a and c is 1 m and b is placed at the mid point between them. The masses of a, b and c are 100g, 200g and 300g respectively. Find the net gravitational force on a, b and c.