When is thermal equilibrium achieved between two objects?

a. when the particles in one object have more kinetic energy

b. when one objects is hotter than the other

c. when both objects have the same temperature

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Amaterial that provides resistance to the flow of electric current is called a(an) (1 points)

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.