1.

A log of wood floats in water with 1/5th of its volume above the surface of water. The density of wood is :

Answer»

`0.8xx10^(3)KGM^(-3)`
`8xx10^(3)kgm^(-3)`
`0.08xx10^(3)kgm^(-3)`
`10^(3)kgm^(-3)`

Solution :Here the wt. of the BODY = Wt. of WATER displaced by immersed PORTION of the body.
`Vxxpg=4/5V.d.g`
`p=4/5.d=0.8xx10^(3)kgm^(-3)`
Correct CHOICE is (a).


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