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A geologist finds that a Moon rock whose mass is 9.97 kg has an apparent mass of 6.40 kg when submerged in water. What is the density of the rock?

  • physics -

    The mass of an equivalent volume of water would be 9.97-6.40 = 3.57 kg

    Divide 9.97 by 3.57 for the specific gravity: 2.793

    The density is 2.793 x (density of water) = 2.793 g/cm^3 = 2793 kg/m^3

  • physics -

    thank you very much

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