When we use electricity to power our electronics what other two less useful forms of energy often result

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative