Water is flowing through a long horizontal tube. Let PA and PB be the pressures at two points A and B of the tube.

Question

KollegeApply · Accepted Answer

PA = PB because the cross-sectional areas at A and B are equal. According to Bernoulli's theorem, pressures at points A and B of the horizontal tube will be equal if water has the same velocity at these points. Also, according to the equation of continuity, velocity at points A and B will be equal only if the cross-sectional areas at A and B are equal. So, PA = PB only if the cross-sectional areas at A and B are equal.

AChoose Your Answer