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Find the order of magnitude of the mass of the moon whose radius is 3.84*10to the power 6 meter and average density is 4*10 to the power 3 kg m-cube



We can consider the moon as a sphere 
mass of moon is = 4/3*pi*R^3*d            (d = density , R = radius)
putting R and d we get 
mass of the moon = 9.48*10^23
hence order is 10^23
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