please neatly show all your work

1. The physics of distinguishing between permanent magnets and ferromagnetic metals. Suppose you have two bars, one of which is a permanent magnet and the other of which is not a magnet, but is made from a ferromagnetic material like iron. The two bars look exactly alike. Explain how you can determine the identities of the look-alike bars with the aid of a third bar that is not a magnet, but is made from a ferromagnetic material. The physics of a magnetic compass and a magnetic dipping needle and the earth's magnetic field. 2. Describe the action of a magnetic compass and a magnetic dipping needle at: o a. the north magnetic pole o b. the south magnetic pole o c. the equator The physics of iron and steel structures and their magnetization. 3. Iron pipes, steel beams, and other steel structures that remain stationary are often found to be magnetized with a distinct polarity. Explain how this can happen