Write the correct statement : The process by which a gas changes to a liquid state at some fixed temperature, with the absorption of heat energy is called vaporisation.

The process by which a gas changes to a liquid state at some fixed temperature, with the absorption of heat energy is called Condensation.

Write the correct statement : The process by which a gas changes …

Calculate the kinetic energy of an object weighing $600 \ kg$ moving at a velocity of $30\ m/s.$

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Define the following and state their numerical value in SI system : Specific latent heat of vaporisation of steam.

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Write the correct statement :
A piece of iron (density $7.6 gcm ^{-3}$) float in mercury (density $13.6 gcm ^{-3}$).

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State the energy changes in the following while in use An electric bulb.

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Name the energy stored in a compressed spring.

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What is the magnitude of a force which produces a pressure of 7000 Pa while acting on a surface of area of cross-section 0.25$m ^2$.

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Why do objects made of wood or plastic float in water ?

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Mention two effects produced on humans by sounds of $90\ dB$ or more.

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An object is any where between the pole and infinity of a convex mirror.

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The coin immersed in water appears to be raised.

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