What gauge pressure is required in the city water mains for a stream from a fire hose connected to the mains to reach a vertical height of 15.0 m? (Assume that the mains have a much larger diameter than the fire hose.)
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A: solution as
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What gauge pressure is required in the city water mains for a
stream from a fire hose connected to the mains to reach a vertical height
of 15.0 m? (Assume that the mains have a much larger diameter than
the fire hose.)
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- Many cities have water tanks raised high off the ground to produce pressure for their residence. If one such water tank had a diameter of 4.40 m and its water level being 20.7 m above the ground. What would be the pressure at ground level if the water was not being used? (static)If at ground level a faucet had an opening with a diameter of 2.00 cm, how fast would the water come out of the faucet?(A) What is the pressure drop (in N/m2) due to The Bernoulli Effect as water goes into a 3.50 cm diameter nozzle from a 8.90 cm diameter fire hose while carrying a flow of 35 L/s? (B) To what maximum height (in m) above the nozzle can this water rise? (The actual height would be significantly smaller due to air resistance)Water is supplied to an office building 30.0 m high through a pipe at ground level. (a) Find the minimum pressure in the supply pipe so that water can reach the top floor of the building. (b)Suppose the pressure in the supply pipe is designed so that water can flow out through a much smaller pipe on the top floor at a speed of 5.0 m/s. Find the pressure in the larger pipe on the ground floor.
- Water is pumped through a pipe of diameter 15.0cm from the Colorado River up to Grand Canyon Village on the rim of the canyon. The river is at 564m elevation and the village is at 2 096 in(a) At What minimum pressure must the water be pumped to arrive at the village? b) If 4500 m3 are pumped per day what is the speed of the water in the pipe? (c) What additional pressure is necessary to deliver this flow? Note you may assume the free- fall acceleration and the density of air are constant over the given range of elevations.Water at a pressure of 4.60 atm at street level flows into an office building at a speed of 0.55 m/s through a pipe 4.80 cm in diameter. The pipes taper down to 2.50 cm in diameter by the top floor, 25.0 m above. Calculate the water pressure in such a pipe on the top floor.(a) What is the pressure drop (in N/m2) due to the Bernoulli effect as water goes into a 2.50 cm diameter nozzle from a 8.70 cm diameter fire hose while carrying a flow of 38.0 L/s? N/m2 (b) To what maximum height (in m) above the nozzle can this water rise? (The actual height will be significantly smaller due to air resistance.) m
- A hypodermic needle is 2.76 cm in length and 0.39 mm in diameter. What pressure difference between the input and output of the needle is required so that the flow rate of water through it will be 1 g/s? (Use 1.0 ✕ 10−3 Pa · s as the viscosity of water.)Water flows in the system shown below. The flow exits the pipe at a speed of 4.0 m/s.(a). What is the water pressure when it exits the pipe?(b). What is the height of the column of water?Water towers store water above the level of consumers for times of heavy use, eliminating the need for high-speed pumps. How high (in m) above a user must the water level be to create a gauge pressure of 3.84 ✕ 105 N/m2?