pressure variation

[sudershanm]

we had a doubt about the given data as suction pressure is 59 meteres above the mean sea level..? if we calculate this with p=qgh it is not matching..and one thing is as the altitutde increses gradually the pressure has to decrease but if we apply the same formula how will it match ...?

 

[quark]

It should match provided you take correct density, acc. due to gravity and height of air column. But you have a simple formula to check atmospheric pressure roughly.

P = 29.92 - 0.001H where P = atmospheric pressure in inches of Hg, and H = height of the area from MSL in feet.

So for 59 meters it is 29.92 - (0.001 x 59 x 3.28)= 29.72 inches of Hg. (or 755 mm of Hg)

Check this with your barometer.

Regards,

 

[ChasBean1]

sudershanm, what are you talking about? It seems like there's about two paragraphs worth of explaining missing...

 

[chicopee]

Her is a quick way of figuring out pressures in feet of water which you can easily convert to metric.
14.69psi*144 sqin/sqft/ 62.4 lbs/cu.ft= 33.9 feet of water or 406.8 inches of water. Therefore you have
27.69 inches of water per psi.
You can do the conversion!!!