Learn how to find the current needed to deflect a compass needle in this step-by-step physics tutorial! Explore the principles of magnetic fields, current-carrying wires, and the interaction with a ...

SAN JOSE, Calif. (KGO) -- When it's time to pay a bill, many of us still write a check and mail it. But is that safe anymore? Postal inspectors say mail theft is rising fast -- and thieves are going ...