Thermal Propert...

If a cylinder of diameter 1.0 cm at 30°C is to be fitted into a hole of diameter 0.9997 cm in a steel plate at the same temperature, then minimum required rise in the temperature of the plate is (Coefficient of linear expansion of steel = 12 × 10^–6/° C)

An iron bar of length 1 and having a cross-section A is heated from 0 to 100°C . If this bar is so held that it is not permitted to expand or bend, the force that is developed, is

If specific heat of a substance is infinite, it means

A gas in an airtight container is heated from 25°C to 90°C. The density of the gas will

A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as

The latent heat of vaporization of a substance is always

The factor not needed to calculate heat lost or gained when there is no change of state is

The saturation vapour pressure of water at 100°C is

50 gm of copper is heated to increase its temperature by 10°C. If the same quantity of heat is given to 10 gm of water, the rise in its temperature is (Specific heat of copper = 420 Joule-kg^–1° C^–1)

Two liquids A and B are at 32°C and 24°C. When mixed in equal masses the temperature of the mixture is found to be 28°C. Their specific heats are in the ratio of