Oil is flowing on a pipe where a manometer of air has been installed. The elevation
z_(A)
and
z_(B)
are 9 m and 11 m , respectively. Given
l_(1)=1.5m
and
l_(2)=80
cm , determine: (a) the pressure difference
p_(A)-p_(B)
, and (b) the difference in piezometric head
h_(z,A)-
h_(z,B)
.