List some variables that we could change in the electromagnet?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.