Question

Water is flowing in streamliries motion through a tube with its axis horizontal. Consider two points A and B in the tube at the same horizontal level.
(a) The pressures at A and B are equal for any shape of the tube.
(b) The pressures are never equal.
(c) The pressures are equal if the tube has a uniform cross-section.
(d) The pressures may be equal even if the tube has a nonuniform cross-section.

Answer 1

(c) The pressures are equal if the tube has a uniform cross-section.

(d) The pressures may be equal even if the tube has a nonuniform cross-section.