College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Is there a net force on a dam due to atmospheric pressure? Explain your answer.
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- 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.arrow_forwardSuppose you have a 8.8 cm diameter fire hose with a 3.6 cm diameter nozzle. a) Calculate the pressure drop due to the Bernoulli effect as water enters the nozzle from the hose at the rate of 40.0 L/s. Take 1.00 × 103 kg/m3 for the density of the water. b) To what maximum height, in meters, above the nozzle can this water rise? (The actual height will be significantly smaller due to air resistance.arrow_forwardWater 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?arrow_forward
- You may have noticed that dams are much thicker at the bottom. Explain why dams are built that way.arrow_forwardb) A horizontal pipe of 25 cm² cross section carries water at a velocity of 3m/s. The pipe feeds into a smaller pipe with a cross section of 15cm². Determine the pressure change that occurs on going from the larger- diameter pipe to the smaller pipe.arrow_forwardA typical blood pressure is 120 mm Hg. How high above the injection site would you need to hang an IV bag so that the fluid enters the blood stream at this pressure? Assume the IV fluid has a density of 1000 kg/m3. Remember, 1 mm Hg = 133 Paarrow_forward
- The pressure in a water tower is 20,256 Pascals (N/m²) higher than at an open faucet. The density of water is 1000 Kg/m'. Use (3. Bernoulli's equation to determine the velocity of outflow from the open faucet. If the height difference between the top water level in the tower and the faucet is 5.1 meters, then the velocity of outflow isarrow_forwardWater travels through a pipe at 11.1 m/s. The pipe expands from a crossectional area of 1.5 m2 to an area of 12.0 m2. What is the speed of the water in the second part of the pipe in m/s? How much is the pressure change in KPa as the pipe expands? The density of water is 1000 kg/m3. Enter a positive value for an increase in pressure, a negative value for a decrease.arrow_forwardSuppose you have a 8.8 cm diameter fire hose with a 3.4 cm diameter nozzle. a)Calculate the pressure drop due to the Bernoulli effect as water enters the nozzle from the hose at the rate of 40.0 L/s. Take 1.00 × 103 kg/m3 for the density of the water. b)To what maximum height, in meters, above the nozzle can this water rise? (The actual height will be significantly smaller due to air resistance.)arrow_forward
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