i)
ii) Which of the following is an example of
the first law of thermodynamics?
(A)The specific heat of an object explains
how easily it changes temperatures.
(B)While melting, an ice cube remains
at the same temperature.
(C) When a refrigerator is unplugged,
20
everything inside of it returns to room
temperature after some time.
(D) After falling down the hill, a ball's
kinetic energy plus heat energy equals
the initial potential energy.
