One cubic centimeter (1.0 cm3) of water has a mass of 1.0 103 kg. (a) Determine the mass of 1.0 m3 of water. (b) Assuming that biological substances are 98% water, estimate the masses of a cell with a diameter of 1.0 mm, a human kidney, and a fl y. Take a kidney to be roughly a sphere with a radius of 4.0 cm and a fl y to be roughly a cylinder 4.0 mm long and 2.0 mm in diameter.
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