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A block of wood of mass 10.8 kg and density 4.42 x 10^2 kg/m3, floats on...

A block of wood of mass 10.8 kg and density 4.42 x 10^2 kg/m3, floats on water. (a) What is the minimum amount of aluminum (density 2.70 x 10^3 kg/m3) that can be placed on top of the wood block and cause the block of wood and the aluminum to sink? (b) If instead it was a block of ice of mass 10.8 kg and density 8.90 x 10^2 kg/m3. What is the minimum amount of aluminum that can be placed on top of the ice block and cause the block of ice and the aluminum to sink?

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