Question

A plastic sphere floats in water with 0.50 of its volume submerged. This same sphere
floats in oil with 0.40 of its volume submerged. Determine the density of the oil. (Ans:
1.25 g/ml)

Answer 1

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Weight of glycerine displaced = weight of water dispalced

Mgh glycerine = Mgh water

Pvgh glycerine = Pvgh water

0.4V P glycerine = (0.5v)/v.4v P water = 1.25

(Polycerine)/p water =

But density of substance = relative density x density of water = 1. 25 x 1000kgm3 = 1250kgm-3

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