Question

As you found out in the previous part, Bernoulli's equation tells us that a fluid element that flows through a flow tube with decreasing cross section moves toward a region of lower pressure. Physically, the pressure drop experienced by the fluid element between points 1 and 2 acts on the fluid element as a net force that causes the fluid to __________.

A. decrease in speed
B. increase in speed
C. remain in equilibrium

Answer 1

Answer:

B. increase in speed

Explanation:

Bernoulli's principle states that, in a constant flow, the sum of its kinetic energy, its potential energy and its internal energy, remains constant. A pressure drop implies an decrease in the sum of its potential energy and its internal energy. Thus, this implies an increase in its kinetic energy, that is, an increase in the fluid's speed.