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Putty or mud is an example of

Since mud or putty has no gross tendency to regain their previous shape & they get permanently deformed, they are close to ideal... View Article

After prolonged use, springs deform permanently because of

Because of elastic fatigue, the material of spring loses its elasticity and deforms permanently.... View Article

A hawk of mass 10 kg dives to catch a mouse. During dive it loses 500 J of its potential energy. The height from where it begins its dive is (take g = 10 m/s2)

Change in Gravitational Potential Energy = mass x acceleration x change in height 500 J = 10 kg x 10 x change in height Change in height = 5 m... View Article

A force of 600 newtons will compress a spring 0.5 metres. What is the spring constant of the spring?

We know, F = kx 600 = k × 0.5 K = 600/0.5 K = 1200... View Article

Out of a pair of identical springs of spring constants 240 N/m, one is compressed by 10 cm and other is stretched by 10 cm. The difference in P.E. stored in the two springs is:

In both cases the P.E. will be kx2/2. Hence. the difference of energies will be zero.... View Article

A vehicle of 50 quintal climbs up a hill of 10 m. The potential energy gained by it is (take g = 10 m/s2)

mass = 50 x 100 = 5000 kg, g = 10 m/s2, h = 10 m Potential energy gained = mgh = 5000 x 10 x 10 = 5 x 105 J... View Article

What is the relation between compressibility and Bulk modulus?

We know that the physics concepts compressibility and bulk modulus are interconnected. These two concepts mainly deals with pressure and volume.... View Article

The potential energy of the spring when stretched

The potential energy of the spring increases because work is done on it when it is stretched.... View Article

You are in a lift moving from the 3rd floor to the 12th floor, through a height H. If the elevator moves at a constant speed without stopping, what is the work performed on you by the elevator? Take your body mass as M.

Answer: Newton's third law of motion - According to newton's third law of motion, the force exerted on the floor by the person is equal and... View Article

Two trucks, one lightly loaded and one heavily loaded are moving with same speed. Then, it is easy to stop

It is easier to stop a lightly loaded truck as its Kinetic Energy is less that the heavily loaded truck.Kinetic energy is directly proportional... View Article

The process by which heat is transferred from one place to another without heating the intervening medium is known as

The process by which heat is transferred from one place to another without heating the intervening medium is known as radiation.... View Article

What is the velocity of radiation?

The velocity of radiation is same as the velocity of light, i.e. c = 3 X 108 m/s.... View Article

The mechanism of transfer of heat between two adjacent parts of a body because of their temperature difference is known as

The mechanism of transfer of heat between two adjacent parts of a body because of their temperature difference is known as conduction.... View Article

A force of 20 N acts on a body and displaces it 2m along the direction of force. Then the work done by the force is:

Work done is defined as force into displacement Work done = F × S Cosθ Where F is the force applied and s is the displacement produce by this... View Article

When the temperature of a substance increases, what happens to the speed of the molecules?

When the temperature is increased, the supplied energy excites the molecules, thus increasing their speed.... View Article

Unit of latent heat is____

Answer: The unit of latent heat is joule. The heat needed to transform a solid into a liquid or vapour phase, or a liquid into a vapour phase,... View Article

If the m mass of the substance undergoes a change from one state to another, then the amount of heat required for the process is

If the m mass of the substance undergoes a change from one state to another, then the amount of heat required for the process is Q = m L, where L... View Article

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