Question

What is the density of a 45 g object that when placed into 25 mL of the water the water rises to 40 mL?

Answer 1

`rho", density"` `=` `"Mass"/"Volume"` `~=3*g*mL^-1`

Explanation:

Clearly, the object has displaced `15*mL` of water, and thus has a volume of `15*mL`.

`rho", density"` `=` `(45*g)/(15*mL)` `=??*g*mL^-1`.