Question

An object of mass $100g$ has a volume of $20c{m}^3$. Calculate the density of the object. Also, state whether the object will float or sink in water.

• A. $5.0gc{m}^{-3},sink$
• B. $2.0gc{m}^{-3},float$
• C. $5gc{m}^{-3},float$
• D. $1.0gc{m}^{-3},sink$

Answer 1

The correct option is A $5.0gc{m}^{-3},sink$

Given, mass = $100g$, volume = $20c{m}^3$
Density of object $=\frac{mass}{volume}$
$=\frac{100g}{20c{m}^3}=5gc{m}^{-3}$

Also, density of water = $1gc{m}^{-3}$
Since density of object > density of water, the object will sink in water.