Exam 9: Fluids

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A wooden ball is tied to the bottom of a swimming pool by a string.What is the tension in the string if the ball's diameter is 0.15 m and its mass is 144 g? The water in the pool is fresh water,1000 kg/m3 density.

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An incompressible fluid is flowing through a horizontal pipe with a constriction.The velocity of the fluid in the wide section of the pipe is 6.00 m/s and the velocity of the fluid in the narrow section of pipe is 8.00 m/s.The pressure of the fluid in the wide section is 250 kPa.What is the pressure in the narrow section of the pipe? (density of the fluid is 1000 kg/m3)

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A 1.50 kg hollow steel ball is submerged in water.It weighs in water 10.75 N.The volume of the cavity inside the ball is (density of steel is 7,900 kg/m3)

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Air with a density of 1.20 kg/m3 flows through a 75.0 cm diameter pipe with a velocity of 2.00 m/s.What is the mass flow rate?

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The surface tension of water is 0.0730 N/m.What is the height of the water in a capillary tube of diameter 2.00 mm?

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A 10 kg ball weighs 98 N in air and weighs 75 N when submerged in water.The buoyant force of the water on the ball is

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Assuming that the outside air pressure is standard,101.3 kPa,what pressure must one generate inside the mouth in order to drink water through a straw whose opening is 12 cm above the water surface?

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A cylindrical tank (height h,radius r)is full to the brim of water and its top is open to the outside air.What expression describes the speed of fluid flowing out of a hole that is opened up at height h' above the bottom of the tank?

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A 2 kg ball is floating in water.The volume displaced by the ball is

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The surface tension of water is 0.0730 N/m.What is the height of the water in a capillary tube of diameter 1.00 mm?

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Pressure is measured in a 1.1 cm radius water hose at a height of 1.5 m above the floor of a house and compared to that in a hose connected to the first (of radius 2.2 cm).If the pressure in the larger radius hose is the same as that in the smaller radius hose,how far above the floor is the location for this pressure measurement?

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An incompressible fluid is flowing through a vertical pipe with a constriction.The wide section is 2.00 cm in diameter and is at the top of the pipe.The pressure of the fluid in the wide section at the top is 200 kPa.The velocity of the fluid in the wide section is 4.00 m/s.The narrow section is located 4.00 m below the wide section.What is the diameter of the narrow section for the pressure of the fluid in the narrow section to equal the pressure in the wide section? (density of the fluid is 680 kg/m3)

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Water undergoes viscous flow through two pipes with the same pressure difference between the ends.Pipe 1 has three times the diameter as pipe 2.Pipe 1 has 2 times the length of pipe 2.If the flow rate through pipe 1 is 0.400 cm3/s,then what is the flow rate through pipe 2?

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An incompressible fluid is flowing through a horizontal pipe with a constriction.The velocity of the fluid in the wide section of the pipe is 4.00 m/s and the velocity of the fluid in the narrow section of pipe is 9.00 m/s.The pressure of the fluid in the wide section is 250 kPa.What is the pressure in the narrow section of the pipe? (density of the fluid is 1000 kg/m3)

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Water has a density of 1000 kg/m3.The column of water that would produce a pressure of 1.0135 ×\times 105 N/m2 is

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Water is flowing through a pipe with a constriction.The area of the narrow section is one-half the area of the wide section.If the velocity of the incompressible fluid is 3.2 m/s in the narrow section,then what is the velocity of the fluid in the wide section?

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A 100 kg mass has a density of 2000 kg/m3.If the volume is decreased by 2% due to compression, then the density is

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A ball with a diameter of 10.0 cm is submerged in water.The buoyant force of the water on the ball is

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The cork in a bottle is 2.00 cm in diameter.If the pressure inside the bottle is 3.00 atm,then the net force on the cork due to the pressure difference is

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A force of 120.0 N is applied to 2.000 cm diameter piston in a closed container of water with a density of 1,000 kg/m3.The force on a piston with a diameter of 25.00 cm is

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