What happens when the thermal energy of a substance increases?

a. the motion of the particles in the substance increases, and the temperature of the substance decreases.

b. the motion of the particles in the substance decreases, and the temperature of the substance increases.

c. both the motion of the particles in the substance and the temperature of the substance decrease.

d. both the motion of the particles in the substance and the temperature of the substance increase

D.Both the motion of the particles in the substance and the temperature of the substance increase

Explanation:

The thermal energy refers to the energy transferred by heat, therefore it refers to the random motion of the molecules in a substance. There is a correlation between the motion of the molecules and the temperature of a substance: the faster the motion of the molecules (and so, the more the thermal energy), the greater the temperature of the substance.

Therefore, the correct answer is

D.Both the motion of the particles in the substance and the temperature of the substance increase

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27