physics

Styrofoam has a density of 300 kg/m^3. What is the maximum mass that can hang without sinking from a 50 cm diameter styrofoam sphere in water? (Assume the volume of the mass is negligible compared to that of the sphere.) V sphere = r^34/3 pie

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  1. You mean (4/3) pi r^3

    r = 0.25 meter

    V = .0654 meters^2

    mass of water displaced-mass of foam
    = (1000-300)(.0654)
    = 45.8 kg

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  2. Calculate the density of sphere whose mass 20g and its diameter 14cm

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