If a piece of metal is heated to temperature `theta` and the allowed to cool in a room which is at temperature `theta_0`, the graph between the temperature T of the metal and time t will be closet to

Which metal is a liquid at room temperature ?

The specific heat of metals at low temperature is

A sphere of radius r, density, rho and specific heat s is heated to temperature theta and then cooled in an enclosure at temperature theta_(0) . How , the rate of fall of temperature is related with r, rho and s?

The graph between the (velocity^(2)) and temperature T of a gas is

A non-metal which is gas at room temperature

The graph between surface tension and temperature T is

A piece of glass is heated to a high temperature and then allowed to cool. If it cracks, a probable reason for this is the following property of glass