Question

1. Which of the following is a direct cause of a substance’s temperature increase? (1 point). Energy is removed from the particles of the substance.. Kinetic energy is added to the particles of the substance.. The number of atoms and molecules in a substance changes.. The volume of the substance decreases.. 2. As the temperature of a substance increases, its volume tends to increase due to (1 point). . thermal equilibrium.. thermal energy.. thermal expansion.. thermal contraction..

Answer 1

Answer:

1. option b

2. option c

Explanation:

1. When temperature of a substance is increased, it is actually caused by the increase in the kinetic energy of the particles of the substance. The particles vibrate more rigorously. Average kinetic energy of a gas is proportional to temperature:

K.E. =0.5 kT²

thus, option b is correct.

2. As the temperature increases, the substance undergoes thermal expansion. Thus, the volume increases.

Option c is correct

Answer 2

If I read this right then its the adding of kinetic energy to the substance. Friction=Heat