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Archimedes' Principle

The reading o...

Question

The reading of a spring balance when a block is suspended from it in the air is 60 N. The reading is changed to 40 N when the block is submerged in water. Find the relative density of the block.

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Solution

Relative density $= \frac{W e i g h t i n a i r}{L o s s o f w e i g h t i n w a t e r} = \frac{60}{60 - 40} = 3$

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