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# Calculating Proton Speed

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Question: At a certain location, the horizontal component of the earth's magnetic field is 4.6E-5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances the weight. Find the speed of the proton.

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#### Solution Preview

In equilibrium, weight of the proton (downward)=magnetic force(upward)
Therefore:

m*g = ...

#### Solution Summary

This solution includes the equation needed to obtain the answer for calculating speed as it pertains to the concept of magnetism for this problem. The equation is gone through step-by-step, all the way to and including the final answer, in a very easy to follow manner.

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