Water pressure in a tank problem

  • Thread starter ar202
  • Start date
  • #1
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Homework Statement



A water pipe feeds a water tower with water. The tower is 15 metres tall.
If the water is to flow into the tank what is the minimum pressure of water at the bottom of the tower?
Assume litre of water = 1 kg
Assume 1 BAR = 1kg cm-2

Homework Equations



P = p g h ?

The Attempt at a Solution



am i using the correct equation...?
 

Answers and Replies

  • #2
45
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sooooooooo...

1000 * 9.81 * 15 = 147150 or 1.45 atmopspheres? :uhh:
 
  • #3
96
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It doesn't matter if you use pascals or atmospheres. And the formula is correct.
 
  • #4
45
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It doesn't matter if you use pascals or atmospheres. And the formula is correct.

ah okay, thanks. Is the answer correct?
 
  • #5
96
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Either you didn't express yourself good enough or you're asking a stupid question. :)
 
  • #6
45
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hah :redface:
 
  • #7
45
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turns out i got this WRONG!!! any thoughts?!
 
  • #8
Apparently You had to count in air pressure (10^5 pascals) since it can still exert pressure on the bottom.....Is it correct with that added?
 
  • #9
45
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Apparently You had to count in air pressure (10^5 pascals) since it can still exert pressure on the bottom.....Is it correct with that added?

Yeah you're right, i didn't factor in surface pressure. doh!
 

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