physics fluids q

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.

inaccensa

Full Member
15+ Year Member
Joined
Sep 5, 2008
Messages
511
Reaction score
1
The net pressure in the first instance is the gauge pressure,
Pressure downward = P+pgh and upward =P; net pressure =pgh
Second case
Pressure downward = P+pgh
The difference between the case 1 and 2 is the atmospheric pressure,is this how you'd solve this problem?
If I want to take the ratio, case1 :2 it will be 3/4
 

Attachments

I can't see the image clearly, but are there plugs at the bottom that are not open to the vacuum or environment? If that's the case, there should be no pressure difference. Otherwise all I can think of is a difference of rho*g*h, but a force of 30000N isn't an option.
 
I can't see the image clearly, but are there plugs at the bottom that are not open to the vacuum or environment? If that's the case, there should be no pressure difference. Otherwise all I can think of is a difference of rho*g*h, but a force of 30000N isn't an option.
One is open to air and the other opens a container devoid of air.
 
Top