Physics

Problem

Air of density

1.2\,\text{kg}\,\text{m}^{-3}

flows past a square window of side

1\,\text{m}

10\,\text{m}\,\text{s}^{-1}

. Estimate the kinetic energy of the air that crosses the window in

1\,\text{s}

. Give your answer in joules.