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Sagot :
Pressure will result from a level of h= 7.2m then P = 9.58 psi and P=4.7 psi for h=5.94 m.
The pressure Pon a static liquid level h is
P= p₀ + ρ*g*h
p₀ is the initial pressure , ρ=density , g is the gravity
ΔP= ρ*g*Δh → ΔP/Δh
= density *gravity = ( 15 psi - 3 psi) /( 8.6 m - 5.5 m)
= 12/3.1 psi/m
P = P₁ + ΔP/Δh*(h -h₁)
P₁ = 3 & h₁= 5.5 m when height is 7.2 m
P = 3 psi + 12/3.1 psi/m *(7.2 m -5.5 m) = 9.58 psi
P = 9.58 when height is 7.2 m
P=4.7 psi
4.7 psi = 3 psi + 12/3.1 psi/m *(h -5.5 m)
h = (4.7 psi - 3 psi)/ (12/3.1 psi/m) + 5.5 m = 5.94 m
then P=4.7 psi for h=5.94 m.
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