# Physics URGENT!!!

At a certain location, the horizontal component of the earth's magnetic field is 2.5 x 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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1. QvB=mg Right?

solve for B

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bobpursley
2. can you please show me what you are doing to solve for v (not B)

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3. v = QB/mg

For Q, use the charge of a proton, in Coulombs. For m, use its mass. The values for proton mass ansd charge are readily available in your textbook or online.

g= 9.8 m/s^2

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4. its V=MG/QB MATE

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