Heat produced by rubbing two objects involves
A. conversion of mechanical energy into heat energy
B. conversion of heat energy into mechanical energy
C. decrease in the kinetic energy of the molecules
D. increase in volume of the objects rubbed together.
Answer:A
Heat produced by rubbing two objects involves
A. conversion of mechanical energy into heat energy B. conversion of heat energy into mechanical energy C. decrease in the kinetic energy of the molecules D. increase in volume of the objects rubbed together.