(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

At a faucet, the diameter of the stream is 0.960cm. The stream fills a [tex]125cm^3[/tex] container in 16.3s.

Find the diameter of the stream 13.0cm below the opening of the faucet.

http://img100.imageshack.us/img100/1258/15222430xr8.th.jpg [Broken]

2. Relevant equations

Bernoulli's eqzn: [tex]P+ 1/2\rho v_1^2 +\rho gy = constant [/tex]

or.....[tex]P_1-P_2 = \rhog(y_2-y_1)= \rho gh [/tex]

continuity eqzn: [tex]Av_1= Av_2 [/tex]

3. The attempt at a solution

um....I'm not sure how to go about doing this Q...

I did do:

Flow rate= [tex]Av_1= 125cm^3 / 16.3s = 7.67cm^3/s [/tex]

after that I'm not sure about how to find the diameter.

I think I need the Area since Av= 7.67cm^3/s that I found and I guess I would go and find v for the first v1 at least.

I am confused as to:

1. is P1 the same as P2 (bottom of stream) ? If it is then would it cancel out?

2. would the v be the same? I think not...but if it isn't then how would I find v1 for when the water comes out of the faucet?

If someone could help me out I'd appreciate it alot.

Thanks

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# Homework Help: Tap water flow and water diameter at end of it (Bernoulli eqzn )

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