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How can we quantify the strength of magnetic fields? How strong is the Earth's field?
Will the power of two magnets stuck together increase the overall force? Why?
How can we describe the strength of the Earth's magnetic field using a magnet and a compass? What does this tell us?
Attempt to measure the change in force of a magnet over a distance using the deflection of a compass. What is wrong with this approach?
Here we compare the speed of compass oscillation vs. distance from a magnet. What kind of relationship do we observe. Is it linear?