Question

Which of the following states Bernoulli’s principle?

A. As the speed of a fluid decreases, the pressure within the fluid decreases.
B. As speed of a fluid increases, the pressure within decreases.
C. As the speed of a fluid changes, the pressure of the fluid remains constant.
D. None of the above

Answer 1

B. As speed of a fluid increases, the pressure within decreases.

Step-by-step explanation:

Answer 2

The correct answer is B. As speed of a fluid increases, the pressure within decreases.
Using formulas, Bernoulli's principle can be written as

`p+ (1)/(2)\rho v^2 + \rho g h=cost.`
where p is the pressure of the fluid,
`\rho` its density, v its speed, and h its elevation above a reference level.
Assuming h does not change, we can see that if the speed v increases, the pressure p must decrease in order to keep constant the sum of the three terms.