To create electromagnetic induction, either the wire or the magnet may be moved, but one of them has to move. true false

What is the measurement of how fast an object moves relative to a reference point?

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.