Physics

Problem

A small rock weighs

3.0\,\text{N}

in air. When it is fully immersed in water, the water level in a measuring cylinder rises from

20\,\text{mL}

26\,\text{mL}

. Take

g = 10\,\text{m s}^{-2}

. Determine the density of the rock in

\text{kg m}^{-3}