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March 30, 2017

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A plastic bobber just barely floats in water. If it weighs 2N in the air, what is its volume

  • physics - ,

    If the body "barely floats" in water, that means that the density is the same as that of water, equal to 1 kg/l.

    The weight, mg = 2N,
    its mass, m = 2N/g = 0.204 kg
    Therefore the volume is 0.204 kg / (1 kg/l)
    = 0.204 l. = 204 cm³

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