ICSE Class 9 Answered
A solid weighs 30 gf in air and 26 gf when completely immersed in a liquid of relative density 0.8. Find : (i) the volume of the solid and (ii) the relative density of the solid.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Given, weight of solid in air = 30 gf and weight of solid in liquid = 26 gf., R.D of liquid = 0.8
Therefore, Density of liquid = 0.8 g cm-3
(i) Let V be the volume of the solid.
Weight of liquid displaced = Volume of liquid displaced xdensity of liquid x g
= V 
0.8g dyne
= V 0.8 gf
Loss in the weight of the solid when immersed in the liquid = 30 - 26 = 4gf
But the weight of liquid displaced is equal to the loss in weight of the solid when immersed in liquid.
Therefore, Vx0.8 = 4 or V = 
= 5 
.
(ii) Given, weight of solid = 30gf
Therefore, Mass of solid = 30 g
Density of solid = 
Hence relative density of solid = 6
Answered by | 04 Jun, 2014, 03:23: PM
ICSE 9 - Physics
Asked by baneetkumar67 | 29 Aug, 2018, 05:07: PM
ANSWERED BY EXPERT
