Question

Which of these statements is not necessarily true for two objects in thermal equilibrium?
A. The objects are made of tiny particles that are moving at the same rate.
B. The objects have the same temperature.
C. The objects' temperatures have both changed by the same amount.
D. The objects' temperatures are not changing.
5. Which statement explains the kinetic theory of heat?
A. An object's thermal energy is caused by the movement of the tiny particles that it is made of.
B. Heat is transferred as thermal energy by the interaction of moving particles.
C. Objects are made of tiny particles, and their motion depends on the temperature.
D. Objects whose particles are at the same temperature are in thermal equilibrium.

Answer 1

1. Answer: C. The objects' temperatures have both changed by the same amount.

Explanation:

An object is said to be in thermal equilibrium when the objects have attained same temperature. Heat transfer from hotter object to colder one in contact takes place until the temperature of the two are equal. It is not necessary that the temperature of both the objects changes by same amount. After attainment of thermal equilibrium, the temperature of the objects stop changing and the tiny particles of the object move at the same rate.

Hence, the objects' temperatures have both changed by the same amount. is not necessarily true for two objects in thermal equilibrium.

2. Answer: C. Objects are made of tiny particles, and their motion depends on the temperature.

Explanation:

Kinetic theory of heat states that the kinetic energy of constituent particles determine the temperature of the object. The statement that best explains this is Objects are made of tiny particles, and their motion depends on the temperature.

Answer 2

Answer:

its C

Explanation:

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