If energies is transferred by a solid what has to be at the ends of it?
Please answer this question asap.

Which describe reflection? check all that apply. light bounces off a boundary.

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than