Pb Pa gae X h

P1 + g water da Tgage X h where ggage is the specific weight of the gage fluid and h is the height of point b with respect to point a.

The pressure at 2 is also lower than the pressure at b and is calculated by:

Finally, the pressure difference between 1 and 2 is written as

NN AP = (2000(9.81) - 1000(9.81) ) _ m- 58.9 2 V m3 v 7 my 1000 m2

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