The water in the plumbing in a house is at a gauge pressure of 230,000 Pa. What
ID: 1629637 • Letter: T
Question
The water in the plumbing in a house is at a gauge pressure of 230,000 Pa. What force does this cause on the top of the tank inside a water heater if the area of the top is 0.6 m2? (Ignore atmospheric pressure.)
A viewing window on the side of a large tank at a public aquarium measures 53 in. by 63 in. The average gauge pressure from the water is 7 psi. What is the total outward force on the window?
A small statue is recovered in an archaeological dig. Its weight is measured to be 14.7 lb and its volume 0.07 ft3.
(a) What is the statue's weight density?
(b) What substance is it, most likely?
iron
ebony wood
juniper wood
silver diamond
Explanation / Answer
Pressure =230000Pa
Area =0.6m^2
Force = pressure *area
=230000*0.6=198000N
Gauge pressure =7psi
Atmospheric pressure = 14.5psi
Total water pressure = 7+14.5=21.5psi
Area =53*63=3339 in^2
Force = 71788 pounds =71.788 kips
Weight of statute =14.7 lb
Volume = 0.07ft^3
Weight density = 210 lb/ft^3
Diamond
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