A piece of steel has a weight w in air, ...

A piece of steel has a weight `w` in air, `w_(1)` when completely immersed in water and `w_(2)` when completely immersed in an unknown liquid. The relative density (specific gravity) of liquid is

`(W-W_(1))/(W-W_(2))`

`(W-W_(2))/(W-W_(1))`

`(W_(1)-W_(2))/(W-W_(1))`

`(W_(1)-W_(2))/(W-W_(2))`

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