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One cubic meter (1.00 m^3) of aluminum has a mass of 2.70x10^3 kg, and the same...

One cubic meter (1.00 m^3) of aluminum has a mass of 2.70x10^3 kg, and the same volume of iron has a mass of 7.86 x 10^3 kg. Find the radius of a solid aluminum sphere that will balance a solid iron sphere of radius 4.64 cm on an equal-arm balance.

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