Solve Problem with Density: Find Object's Density

[yoleven]

Homework Statement

if an object weighs 20 grams in air but 3.5 grams in a liquid of density 1.7g/c,^3
What is the density of the object?

Homework Equations

density=m/v

The Attempt at a Solution

v=20-3.5/1.7
=9.7
then, density would be;
d=3.5/9.7
=0.36
Is that correct?

 

[Doc Al]

The Attempt at a Solution

v=20-3.5/1.7
=9.7

This is good. (Units = cm^3, I presume.)

then, density would be;
d=3.5/9.7
=0.36

Careful. What's the mass of the object?

 

[yoleven]

thanks, as usual!

 

[fa7alerr0r]

mass is a measure of matter not weight!