Determine $($a$)$ the difference in pressure and $($b$)$ the difference in pletomettic head tetween points A and $B.$ The elevations $z_A$ and $z_s$ are $10$ m and $11$ m $,$ respectlvely, $Q_1=1m,$ and the thanometer deffection $E_2$ is $50$ cm $.$

Assume $T=10C$

$3$