If one object is hot and another one cold, thermal energy
a. will move from the cold object to the hot one
b. will move from the hot object to the cold one
c. will move back and forth between the hot and cold objects
d. will not move at all
B. Thermal energy will move from the hot object to the cold one. This is proved by the second law of thermodynamics: Heat flows spontaneously from a hot to a cold body.
