Pressure Gauge

Pascal’s Principle Increases in pressure are distributed equally throughout a fluid (walls, sides, bottom) Pressures a scalar quantity (non-directional)

Pascal’s Principle Hydraulic lift F1 W p2A2 p1A1 P1 = P2  W/A2 = F1/A1  F1 = W(A1/A2) 1

Pascal’s Principle. A machine using Pascal’s Principle……

Pascal’s Principle

Pascal’s Principle

wghw+ Po = xghx + Po  w h w=  x h x First, pressure depends on depth alone, do you can draw a line of equal pressure at a convenient point of known depth and write an equation showing Pw = Px Pw = Px wghw+ Po = xghx + Po Canceling terms……..  w h w=  x h x Find the density of the unknown fluid x if h w= 10 cm and h x = 15 cm

Find the density of the unknown fluid x if h w= 10 cm and h x = 15 cm

Specific Gravity For sinkers only : SG = Weight of object in air / apparent weight lost in water For floaters only : SG = % sunk