Explain why :
(a) Two bodies at different temperatures `T_1` and `T_2` if brought in thermal contact do not necessarily settle to the mean temperature `(T_1 + T_2 )//2`.
(b) The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat.
(c) Air pressure in a car tyre increases during driving.
(d)The climate of a harbour town is more temperate than that of a town in a desert at the same latitude.

Explanation

(a) It is due to that two bodies may have different thermal capacity. When they are brought in thermal contact, heat flows from the body at higher temperature to the body at lower temperature till equilibrium is achieved means, the temperature of both the bodies becomes equal. If both bodies have same thermal capacities their final mean temperature may have `(T_1+T_2)/2`.
(b) This is because heat absorbed by a substance is directly proportional to be specific heat of the body so, for the same amount of increasing in temperature and body having high specific heat, higher is its heat absorbing capacity and hence this would prevent the plant from getting too hot.
(c) When a car is in motion the air temperature inside the car increases because of the motion of the air molecules. According to Charles. law temperature is directly proportional to pressure ( P`prop` T). Hence, if the temperature inside a tyre increases, then the air pressure in it will also increases.
(d) In the atmosphere of harbour near the ocean side, the vapour of the ocean water mixes with the air near the ocean so, atmosphere stays warm. While in the atmosphere of jungle situated at same latitude, there is no water vapour present and so its atmosphere stays less warm.