For a mechanical bar screen, the bars are $1\mathrm{.}3$ cm thick, and these are having $4$ cm clear opening. The approach channel is designed to have a maximum velocity of $0\mathrm{.}65$ m$/$s$.$ Assume discharge co$-$efficient as $0\mathrm{.}7$ and $0\mathrm{.}6$ for clean and clogged screen, respectively. Determine the followings: i$.$ ii$.$ iii. The velocity between the bars The head loss The head loss when the net area of the screen is clogged by $40\%$