Two objects A and B have the same mass and the same specific heat. Object A is heated from 30°C to 70°C and object B is cooled from 70°C to 30°C. How are the thermal energies of the two objects related after the temperature change has occurred?

Question

A. The thermal energies of A and B have the same magnitude but opposite signs.
B. The thermal energies of A and B are the same.
C. The thermal energy of B is higher than the thermal energy of A.
D. The thermal energy of A is 40 kJ and the thermal energy of B is 30 kJ.

Answer 1

answer is a

Answer 2

Its A