₦airaland Forum

A body of density 9.0g/cm³ appears to have a mass of 27.0g in a liquid of density 1.2g/cm³. what is the volume of the solid

I bet when I was in SS3 this would have been a piece of cake; buh in 500 level, I simply have no idea.. And I feel good, as mind keeps telling me that "it ain't physics but chemistry, so yhu don't need to know it"

Recall: Density = Mass/Vol
Let V= Volume of solid
Therefore mass of solid in air = density × vol = 9×V = 9V
Mass of liquid displaced= mass in air - mass in Liquid
= 9V- 27
But volume of Liquid displaced = Volume of solid
Therefore, 1.2= 9V-27/V
1.2V= 9V-27
9V-1.2V=27
7.8V=27
V= 27/7.8
V= 3.5CM3 = Volume of solid

SomeHenro:
Recall: Density = Mass/Vol
Let V= Volume of solid
Therefore mass of solid in air = density × vol = 9×V = 9V
Mass of liquid displaced= mass in air - mass in Liquid
= 9V- 27
But volume of Liquid displaced = Volume of solid
Therefore, 1.2= 9V-27/V
1.2V= 9V-27
9V-1.2V=27
7.8V=27
V= 27/7.8
V= 3.5CM3 = Volume of solid

WOW, You are a genius I've been trying to help him solve the question for about an hour now, with two physics textbooks, two pen and a long note, still I couldn't solve it. Thanks bro

SmithRussell:
I bet when I was in SS3 this would have been a piece of cake; buh in 500 level, I simply have no idea.. And I feel good, as mind keeps telling me that "it ain't physics but chemistry, so yhu don't need to know it"

LOL, I was just staring at the question for several minutes, to the extent I had to get 2 physics textbooks, still I wasn't able to solve it ooo. Probably because it's been a long time since I studied the subject, 300L in a very unrelated course again.

Snowale:
WOW, You are a genius I've been trying to help him solve the question for about an hour now, with two physics textbooks, two pen and a long note, still I couldn't solve it. Thanks bro

You are welcome bro.