What energy transformation takes place when you turn on a space heater?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?