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Pressure formulalist
1. Force and
Pressure
F1
A1
A2
F2
X Y
h1
h2
Patm
Density = ρ1
Density = ρ2
1 1 2 2h h
Patm
Patm
Patm
Patm
= hρg
P= hρg
h
vacuum
1 2
1 2
F F
A A
Pressure at X = Pressure at Y
F
P
A
30cm
5cm
25cm
Gas Supply
Water
h
Patm
Pgas
h
Patm
Pgas
h
Patm
Pgas
Mercury
Mercury Mercury
Pgas
= Patm
Pgas
= Patm
- hρgPgas
= Patm
+ hρg
Upthrust
Displaced water
Upthrust = Weight of the Displaced Water
atmP P h g
P h g
atmP P h g
F Vg
Important Formulae for Force and Pressure
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