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The centre of two identical spheres are `1.0` m apart . If the gravitational force between the spheres be `1.0` N , then what is the mass of each sphere ?
`(G = 6.67 xx 10^(-11) m^(3) kg^(-1) s^(-2))` .

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gravitational force `F = (Gm.m)/(r^(2))`
on substituting F =1.0N, r = 1.m and `G = 6.67 xx 10^(-11) m^(3) kg^(-1) sec^(-1)`
we get `m = 1.225 xx 10^(5) kg` .
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