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  4. Two solid pieces, one of steel and the other of aluminium when immersed completely in water have equal weights. When the solid pieces are weighed in air

Q. Two solid pieces, one of steel and the other of aluminium when immersed completely in water have equal weights. When the solid pieces are weighed in air

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Solution:

In air, force of gravity acts on metals. Thus, these have their actual weight. Atomic weight of steel, , iron is and that of aluminium is .Hence, it can be said that in air the weight of aluminium is half the weight of steel.