Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbol used
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height*density*gravity
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Presure = Force / Area
= Weight of liquid / Area
= mg / A
= Vdg/A ………[∵ Mass = Volume × Density]
= ALdg/A ……[∵ Volume = Area × Length]
= Ldg
Where
L = Distance between point and surface of liquid
d = Density of liquid
g = Acceleration due to gravity = 9.8 m/s²
= Weight of liquid / Area
= mg / A
= Vdg/A ………[∵ Mass = Volume × Density]
= ALdg/A ……[∵ Volume = Area × Length]
= Ldg
Where
L = Distance between point and surface of liquid
d = Density of liquid
g = Acceleration due to gravity = 9.8 m/s²
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