Question

A horizontal pipe narrows from a diameter of 10 to 5 cm. For an incompressible fluid flowing from the larger diameter to the smaller:

Question 5 options:

1.the velocity and pressure both increase.

2.the velocity increases and the pressure decreases.

3.the velocity decreases and the pressure increases.

4.the velocity and pressure both decrease.

5.the velocity increases but the pressure is unchanged.

Answer 1

along a streamline for example down the center Bernoulli equation applies:

p + (1/2) rho v^2 = constant if height does not change

When the diameter decreases, the same amount per second has to flow through a smaller area so velocity increases (continuity)

Therefore
smaller diameter --> faster flow and by Bernoulli thus lower pressure -->2

Answer 2

Thank you so much!

Answer 3

Anyone know about this answer

Answer 4

Anyone know about this question

Answer 5

The velocity increase and pressure decreases

Answer 6

Velocity increase pressure decreas

Answer 7

8. A horizontal pipe narrows from a diameter of 10 cm to 5cm. For a fluid flowing from the larger diameter to the smaller,
a. the velocity and pressure both increases.
b. the velocity increases and pressure decreases.
c. the velocity decreases and pressure increases.
d. the velocity and pressure both decreases.
Ans is ;b

Answer 8

Option 2

Answer 9

Yes, option 2 is correct. The velocity increases and the pressure decreases when a fluid flows from a larger diameter to a smaller diameter in a horizontal pipe. This is due to the principle of continuity and Bernoulli's equation. According to continuity, the mass flow rate of the fluid remains constant throughout the pipe. As the area of the pipe decreases, the velocity of the fluid increases to maintain this constant mass flow rate. Bernoulli's equation states that in a horizontal pipe, the pressure is inversely proportional to the velocity. Therefore, as the velocity increases, the pressure decreases.