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At a certain location, the horizontal component of the earth's magnetic field is 2.1×10−5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight. Find the speed of the proton. Number Units

At a certain location, the horizontal component of the earth's magnetic field is 2.1×10−5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight. Find the speed of the proton. Number Units

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At a certain location, the horizontal component of the earth's magnetic field is 2.1 × 10 − 5 T , due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight. Find the speed of the proton.
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