A container whose capacity is 70 ml is filled with a liquid up to 50 ml. then the liquid in the container is heated. Initially, the level of the liquid falls from 50 ml to 48.5 ml. then we heat more, the level of the liquid rises to 51.2 ml. find the apparent and real expansion.

For a given heat in liquid, the apparent expansion is more than that of real expansion.

A closed bottle contains some liquid. The bottle is shaken vigorously for 5 minutes. It is found that the temperature of the liquid is increased. Is heat transferred of the liquid? Is work done on the liquid? Neglect expansion on heating.

The volume of water is a measuring cylinder is 50 ml. When a stone is tied to a string is immersed in the water, the water level rises to 83 ml. Find the volume of the stone.

Shows a peddle wheel couple to a mass of 12 kg through fixed frictionless pulley. The paddle is immersed in a liquid of heat capacity 4200 J K^(-1) kept in an adiabatic container. Consider a time interval in which the 12 kg block falls slowly through 70cm. (a) how much heat is given to the liquid ? (b) how much work is done on the liquid? (c ) calculate the rise in the temperature of the liquid neglecting the heat capacity of the container and the paddle.

The initial and final temperatures of a liquid in a container are observed to be 75.4 pm 0.5^(@)C and 56.8 pm 0.2^(@)C . Find the fall in the temperature of the liquid.

True or false. If false give the correct statement: (i) Thermal energy always flows from a system at higher temperature to a system at lower temperature. (ii) For a given heat in liquid, the percenrage apparent expansion is more than that of real expansion.

A liquid-nitrogen container is made of a 1-cm thick styrofoam sheet having thermal conductivity 0.025Js^(-1)m^(-1)C^(-1) . Liquid nitrogen at 80K is kept in it. A total area of 0.80m^(2) is in contact with the liquid nitrogen. The atmospheric temperature is 300K . Calculate the rate of heat flow from the atmosphere to the liquid nitrogen.