# physics

A block of metal which weighs 60 newtons in air and 40 newtons
under water has a density, in kilograms per meter cubed, of:

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asked by Steve
1. buoyant force = 20N = rhowater g V = 9800 V
so
V = 20/9800

mass = 60/g = 60/9.8

so rho metal = mass/volume = (60/9.8) / (20/9800)= 3000 kg/m^3 or three times the density of water

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posted by Damon
2. 3000

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posted by Ida Lyn

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