Water supplied to a house by a water main has apressure of 3.00×105 N/m2 early on a summer day whenneighborhood use is low. This pressure produces a flow of20.0 L/min through a garden hose. Later in the day, pressureat the exit of the water main and entrance to the house drops,and a flow of only 8.00 L/min is obtained through the samehose. (a) What pressure is now being supplied to the house,assuming resistance is constant? (b) By what factor did theflow rate in the water main increase in order to cause thisdecrease in delivered pressure? The pressure at the entranceof the water main is 5.00×105 N/m2 , and the original flowrate was 200 L/min. (c) How many more users are there,assuming each would consume 20.0 L/min in the morning?
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
Water supplied to a house by a water main has a
pressure of 3.00×105 N/m2 early on a summer day when
neighborhood use is low. This pressure produces a flow of
20.0 L/min through a garden hose. Later in the day, pressure
at the exit of the water main and entrance to the house drops,
and a flow of only 8.00 L/min is obtained through the same
hose. (a) What pressure is now being supplied to the house,
assuming resistance is constant? (b) By what factor did the
flow rate in the water main increase in order to cause this
decrease in delivered pressure? The pressure at the entrance
of the water main is 5.00×105 N/m2 , and the original flow
rate was 200 L/min. (c) How many more users are there,
assuming each would consume 20.0 L/min in the morning?
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