Physics Past Questions and Answers

A cube made of metal of linear expansivity \(\alpha\) is heated through a temperature \(\theta\). If the initial volume of the cube is V_o, the correct expression for the increase in volume of the cube is

A relative density bottle of volume 50cm³ is completely filled with a liquid at 30^oC. It is then heated to 80^oC such that 0.75cm³ of the liquid is expelled. Calculate the apparent cubic expansivity of the liquid.

A body of mass 200g and specific heat capacity 0.4Jg^-1k^-1 cools from 37^oC to 31^oC. Calculate the quantity of the heat released by the body.

According to the kinetic theory of gasses, which of the following property of a gas can be affected by the collision of the gas molecule with the walls of the container?

The pressure of a fixed mass of an ideal gas at 27°C is 3 pa. The gas is heated at a constant volume until its pressure is 5 pa. Determine the new temperature of the gas.