How does a magnet affect the pull of a metal?

Explanation:

A magnet is an object that can pull certain types of metal toward itself attract or push those metals away repel. Only certain metals have magnetic properties, namely iron, nickel, cobalt, and a few rare-earth metals such as neodymium. Today, magnets are usually made of alloys containing these metals.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

we need to know the time interval during which the force acts. impulse of force = momentum change