Question

Water has a pressure of 3.00 x 105 Pa and a speed of 1.00 m/s as it flows through a horizontal pipe. At a certain point, the pipe narrows to one-fourth its original diameter. (Remember the radius is half of the diameter, so its radius will also be one-fourth its original size.) What is the speed of the water flow in the narrow section of the pipe?
a.
16.0 m/s
c.
16.2 m/s
b.
12.6 m/s
d.
22.6 m/s

Answer 1

@Mashy I got the answer c

Answer 2

Close? math a bit off?

Answer 3

how did you get that?

Answer 4

I used Bernoulli's principle

Answer 5

well attempted

Answer 6

it's a bit confusing.

Answer 7

well bernoullis can be used to evaluate the pressure..
but u don't need the pressure

u need speed

u need the equation of continutiy

A1v1 = A2v2

since radius goes down by a factor of 4, the Area goes down by a factor of 16 ..
so the speed goes up by a factor of 16

Answer 8

Where exactly would i plug in the normals in the question?

Answer 9

normals?

Answer 10

i just gave u the answer xD

Answer 11

Lol what the hell, idk why i put normals. Numbers*