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ENGG252 (DB225) Engineering Fluid Mechanics

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A vertical

rectangular wall with a width of 20 m and a height of 12 m is holding a

9.185-m-deep water body. The line of action

yp

for the resultant hydrostatic force on this wall is (disregard the atmospheric

pressure)

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Consider the vertical

rectangular wall of a water tank with a width of 5 m and a height of 9.85 m. The

other side of the wall is open to the atmosphere. The resultant hydrostatic

force on this wall is

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A 1.8-m-diameter and

1.4-m-long cylindrical container contains a fluid with a specific gravity of

0.73. The container is positioned vertically and is full of the fluid.

Disregarding atmospheric pressure, the hydrostatic force acting on the top and

bottom surfaces of this container, respectively, are

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A vertical

rectangular wall with a width of 20 m and a height of 12 m is holding a

9.185-m-deep water body.  The resultant

hydrostatic force acting on this wall is

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The pressure

difference between the top and bottom of a water body with a depth of 10 m is

(Take the density of water to be 1000 kg/m

3.)

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The absolute pressure

in a tank is measured to be 65 kPa. If the atmospheric pressure is 100 kPa, the

vacuum pressure in the tank is

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A 2-m-long and

3-m-wide horizontal rectangular plate is submerged in water. The distance of

the top surface from the free surface is 3 m. The atmospheric pressure is 95

kPa. Considering atmospheric pressure, the hydrostatic force acting on the top

surface of this plate is

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The gage pressure in

a pipe is measured by a manometer containing mercury (

r = 13,600 kg/m3

). The top of the

mercury is open to the atmosphere and the atmospheric pressure is 100 kPa. If

the mercury column height is 57 cm, the gage pressure in the pipe is

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Water is compressed from 80 kPa to 2400 kPa at constant

temperature. The initial density of water is 1000 kg/m

3

and the

isothermal compressibility of water is

a = 4.8x10-5 atm-1. The final density of the water is

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The surface tension of

soap water at 20

°C is ss = 0.025 N/m. The gage pressure inside a soap bubble of diameter 4 cm at 20°C is

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