The pressure in a water pipe on the ground floor off a building is 80000 Pa whereas on the third floor is 10,0000 Pa. Find the height of the third floor.
Answers
Answer:
I’m going to overlook the fact that you have capitalised pascal, and put decimal markers (commas) after the second digits (indicating the same as 80 kPa).
I’m going to assume that by “ground floor” you mean me to take that as the height datum from which to state the height of the third floor. And that your floors are labelled G, 1, 2 and 3.
The height difference is what has caused 70 kPa of difference in head.
Head (m) = Pressure (N/m2) / Specific Wt (N/m3)
The pressure = 70 000 N/m2
The specific weight of water = 9 800 N/m3
Head is therefore 7.14… m
The height difference is therefore 7.14 m
Which makes me wonder whether this building is located in The Shire. 2.38 m is not much for a floor to floor height.
Now, back to the hard stuff.
Hydrostatic pressure on the ground floor. You already told us. 80 kPa