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Question
A piece of brass weighs 175 gf in air and 150 gf when fully submerged in water. The density of water is 1.0 g cm-3.
(i) What is the volume of the brass piece? (ii) Why does the brass piece weigh less in water?
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Solution
Weight of piece of brass in air = 175 gf
Weight of piece of brass when fully immersed in water = 150 gf
Density of water = 1 g cm-3
(i) Volume of brass piece = Loss in weight = 175 - 150 = 25 cm3
(ii) The brass piece weighs less in water due to upthrust .
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