![]() ![]() ![]() ⎠ ⎠ Answer 4-3 In a manometer containing liquid mercury, the height is read as 6 in. Solution: At an assumed temperature of 70✯, the density of water (from Table B-6) is ρ H 2O = 62.2 lbm/ft 3 The pressure in an incompressible fluid as a function of depth is P = Patm + ρ gh ⎛ ⎜ 1 lbf lbf ⎛ lbm ⎞⎛ ft ⎞ = 14.7 2 + ⎜ 62.2 3 ⎟⎜ 32.2 2 ⎟ ( 725ft ) ⎜ in. Approach: Use the equation for pressure as a function of depth in an incompressible fluid: P = Patm + ρ gh. Assuming atmospheric pressure is 14.7 lbf/in.2, calculate the pressure in the reservoir at the base of the dam. ⎠ ⎦ ⎣ Answer P = 19.0 lbf in.2 4-2 Hoover dam stands at a height of 725 ft above the Colorado river. ![]() Solution: At an assumed temperature of 70✯, the density of water (from Table B-6) is ρ H 2O = 62.2 lbm/ft 3 The pressure in an incompressible fluid as a function of depth is P = Patm + ρ gh ⎡ ⎛ ⎞ ⎛ 1ft 2 ⎞ ⎤ 1lbf = 14.7 lbf in.2 + ⎢( 62.2 lbm/ft 3 )( 32.2 ft/s 2 ) (10 ft ) ⎜ 2 ⎟⎜ 2 ⎟⎥ ⎝ 32.2 lbm ⋅ ft/s ⎠⎝ 144in. So on the element.4-1 If atmospheric pressure is 14.7 lbf/in.2, what is the pressure at a depth of 10 ft of water? Approach: Use the equation for pressure as a function of depth in an incompressible fluid: P = Patm + ρ gh. No, I mean writing here Freud force that is acting on on the strip. So here I will write at this age is difficult to three -Y. So that means this height so edge that will be equal to the registry minus Y. Or I can say that step from the top so that its edge. Now next https that is that is the height of this element. The X will be equal to There is 4/3 time software. So that is X divided by why that will be equal to four divided by three. Similarly law for this bigger triangle and this smaller triangle. So that is they told me why now next TVs that is use a similarity of Randall. And the the element having it hide from the bottom. So thickness will be that is the way and this plant will be that is considered that is X. So considered that this will be elements. Here I'm taking an element from a distance of at a distance of life from the bottom. So no, According to tradition this length is given. ![]()
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