Problem $2$

Water is withdrawn from an $8-$m$-$high water reservoir by drilling a $2\mathrm{.}2-cm-$ diameter hole at the bottom surface. Ignoring the effect of the kinetic energy correction factor, calculate the flow rate of water through the hole if

a$)$ the entrance of the hole is well$-$rounded

$1$

b$)$ the entrance of the hole is sharp$-$edged