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07-12-2017
Geography

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A nasa scientist studies a moon rock whose mass is 9.30 kg and finds that it has an apparent mass of 6.30 kg when submerged in water.

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17-12-2017

This means the buoyancy or upward force is 3kg. Mass - buoyancy = apparent mass so 9.3 kg - 3 kg = 6 kg

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