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Asked by alex

trying to study but stuck with this one.

Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 4.62 x 10-6 kg. The gravitational force that each sphere exerts on the other is balanced by the electric force. Determine the charge magnitude.
12 years ago

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Answered by Elena
F(el)=k•q²/r²
k =9•10^9 N•m²/C²

F(gr) =G•m²/r²
G =6.67•10^-11 N•m²/kg²,
k•q²/r² = G•m²/r²,
q =sqrt(G•m²/k)
12 years ago

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