3a) The temperature of a body cannot measure the quantity of thermal energy in the body but it can tell us the direction of flow of thermal energy.
The quantity of thermal energy in the body depends on the heat capacity of the body rather than just the temperature.
bi) The resistance change per unit temp change is greater at the inital range compared to the later range , hence it is more sensitive to temperature changes.It also measures with greater precision( more sf can be read from R)
