What does Thermal motion mean ?
(A) Motion due to heat engine.
(B) disorderly motion of the body as a whole.
(c) Motion of the body that generates heat.
(d) Random motion of molecules.
Answer is (A) 0.001 kcal
Heat required to raise the temperature of 1 gram of water through 1° C is 1 cal = 0.001 kcal.
