Help me in a problem about pressure and force

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A new chemical engineering student seeks help with a problem involving forces and pressure. Initial discussions emphasize the importance of understanding the relationships between force, pressure, and height, as well as ensuring consistent units in calculations. The student attempts to apply the principle of equilibrium (P1 = P2) but struggles with unit conversions and the need to account for the weight of additional oil on one side of the equation. Clarification is provided regarding the use of oil density and specific gravity, indicating that the oil's properties remain constant throughout the problem. The conversation highlights the necessity of proper unit management and the consideration of all forces involved in solving the problem.
Luj
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Hey guys...
i'm new student in chemical engineering
and i want your help in a problem:

http://dc16.arabsh.com/i/03036/a79xeldzokge.png

at least give me the general idea and i would be greatful...

my regards...
Luj :)
 
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Welcome to PF!

Hi Luj! Welcome to PF! :wink:

(pleeeeeeeeeeeeeeeeeease don't post such wide pictures :redface:)

Hint: what are the forces involved?

What is the relation between force and pressure?

What is the relation between pressure and height? :smile:​
 
Hey tiny tim :)
sorry i uploded a new pic :)

i actually got this:
P1 = P2
so F1/ A1 = F2 /A2
10000/500 = F/5 "but still can't complete!"

!?
 
First of all, you should realize that the applied force in Newtons can't be calculated directly without conversion, because the rest of the data is in imperial units. Make sure your equations use data having consistent units!
 
Hey Luj! :smile:

(try using the X2 icon just above the Reply box :wink:)

Don't forget the weight of the extra oil on the right-hand side! :wink:
 
ok guys, should i use the density (0.78) here and in which side??
please can anyone tell me the right form for this pb? :(
 
The oil has the same specific gravity throughout.
 

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