In the Northern Hemisphere, the direction of Earths
Chapter 19, Problem 19.72(choose chapter or problem)
In the Northern Hemisphere, the direction of Earths magnetic eld becomes more and more nearly vertical the farther north one goes. To nd the variation from the horizontal of the magnetic eld in your locale, try the following: press an unmagnetized needle through a PingPong ball, and balance the structure between two drinking glasses that are lined up along an eastwest line. Next, press a magnetized needle through the ball at right angles to the unmagnetized needle so that the needle points north. The magnetized needle can now rotate in the vertical direction and will point in the direction of Earths magnetic eld, which is at some angle below the horizontal. Take several measurements of this dip angle and obtain an average value.
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