If you put a pot on the stove, the pot becomes hot. the heat is transferred to the pot on the burner by radiation. select the best answer from the choices provided
a. true
b. false

The answer is False. The example of heat transfer in this problem is not by radiation, but by conduction. This is because the pot is put directly on the surface of the stove, which is what conduction is - direct contact between two surfaces at different temperatures. Radiation, on the other hand, involves heat transfer by electromagnetic waves such as heat from the sun to the Earth.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.