What is the density of a mixture of 90% air (density air 1.20 kg/m3) and 10% helium (density of 0.180 kg/m3)?

A) 0.680 kg/m3 B) 0.750 kg/m3 C) 0.980 kg/m3 D) 1.098 kg/m3 E) 1.103 kg/m3 A) 0.680 kg/m3 B) 0.750 kg/m3 C) 0.980 kg/m3 D) 1.098 kg/m3 E) 1.103 kg/m3

The pressure at what depth in seawater (1025 kg/m3)is equivalent to that at a depth of 10.0 m in fresh water (1000 kg/m3)?

A) 10.2 m B) 9.8 m C) 10.3 m D) 9.7 m A) 10.2 m B) 9.8 m C) 10.3 m D) 9.7 m

A ball naturally floats with 35% of its volume above the surface of a pool filled with mercury (density 13600 kg/m3).If a force of 1200 N is required to force the ball completely under water,what is the radius of the ball?

A) 5.7 cm B) 31.9 cm C) 14.9 cm D) 12.9 cm A) 5.7 cm B) 31.9 cm C) 14.9 cm D) 12.9 cm

Exam 9: Fluids | Examlex

Water flows in a flexible tube of radius 1.5 cm at the floor level of a house.If the tube is joined to a second tube of smaller radius (1.2 cm),what is the speed of water in this smaller radius tube at a height of 7.2 m above the floor?

(Multiple Choice)

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Question 61

A horizontal section of an artery narrows from a diameter of 8.0 mm to a diameter of 6.0 mm.What is the pressure difference between the wider section and the narrower? That is,what is P_wide - P_narrow? The blood flows in the wider section at 48 cm/s.Take blood plasma to have a density of 1025 kg/m³ and ignore viscosity.

(Multiple Choice)

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Question 62

A mercury manometer measures a pressure of 200.0 mmHg.What is this pressure in Pa?

(Multiple Choice)

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Question 63

A sphere is made up of two layers: The first is lead (density 11340 kg/m³)and is of radius R.The second is tin, (7310 kg/m³)and is concentric with the first,from radius R to radius 2R.The sphere is placed in a pool of mercury (density 13600 kg/m³).How much of the volume of the sphere is below the surface?

(Multiple Choice)

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Question 64

In an attempt to avoid "the bends" which occurs if a diver rises too quickly after having been at great depth in the ocean for a long period of time,a diver should come to the surface relatively slowly.What would the rate of change (in Pa/s)of the water pressure be on a diver in the ocean as he rose at 15 m/min? The density of seawater is 1017 kg/m³.

(Multiple Choice)

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Question 65

The surface tension of soapy water is 0.0250 N/m.What is the height of the water in a capillary tube of diameter 2.00 mm?

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Question 66

A small hole is cut in the bottom of a water storage tank.The initial depth of the water is 8.00 m.If the diameter of the small hole in the bottom of the tank is 1.00 cm,then what is the flow rate of the water leaving the tank?

(Multiple Choice)

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Question 67

A compressible fluid is flowing through a pipe with a constriction.The diameter of the narrow section is 1/2 the diameter of the wide section.The density of the fluid in the narrow section is 3/4 the density of the fluid in the wide section.If the velocity of the compressible fluid is 3.600 m/s in the narrow section,then what is the velocity of the fluid in the wide section?

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Question 68

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 1cm in diameter and is located 2.00 m below the wide section.What is the pressure of the fluid in the narrow section? (density of the fluid is 1,000 kg/m³)

(Multiple Choice)

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Question 69

What is the density of a mixture of 90% air (density air 1.20 kg/m³) and 10% helium (density of 0.180 kg/m³)?

(Multiple Choice)

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Question 70

A viscous fluid is flowing through a small tube at a rate of 0.200 m³/s.If the pressure difference between one end of the tube and the other is doubled,the length is halved and the radius is also doubled,then what is the rate of flow of the fluid?

(Multiple Choice)

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Question 71

The pressure at what depth in seawater (1025 kg/m³)is equivalent to that at a depth of 10.0 m in fresh water (1000 kg/m³)?

(Multiple Choice)

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(88)

Question 72

A ball naturally floats with 35% of its volume above the surface of a pool filled with mercury (density 13600 kg/m³).If a force of 1200 N is required to force the ball completely under water,what is the radius of the ball?

(Multiple Choice)

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(73)

Question 73

What is the force on the top surface of a 10.5 cm-diameter soup can that is submerged in 350 m of seawater,whose density is 1017 kg/m³? The air pressure outside is 101.5 kPa.

(Multiple Choice)

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Question 74

The difference in blood pressure between the head and the foot of a person who is 2.000 m tall and resting on an incline that is at an angle of 30.00 degrees to the horizontal is (density of blood is 1,060 kg/m³)

(Multiple Choice)

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Question 75

Glycerin at 30 $^{\circ}$ C has a density of 1,260 kg/m³ and a viscosity of 0.630 Pa-s.The glycerin is poured through a funnel with a neck that is 10.0 cm long and 1.00 cm in diameter.If the level of glycerin is kept at a level 5.00 cm above the neck,then what is the flow rate of the glycerin through the funnel?

(Multiple Choice)

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Question 76

An incompressible fluid is flowing through a pipe with a constriction.The pipe is on an incline with an angle of 30.0 degrees.The narrow section is 10.0 m from the wide section and the narrow section is lower than the wide section.The velocity of the fluid in the wide section of the pipe is 4.00 m/s.The diameter of the wide section is 12.00 cm and the diameter of the narrow section is 9.00 cm.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 1,000 kg/m³)

(Multiple Choice)

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Question 77

A 10.0 kg ball weighs 98.0 N in air and weighs 65.0 N when submerged in water.The volume of the ball is

(Multiple Choice)

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Question 78

The water level in a water tower is 50 m above the ground.What is the gauge pressure of the water at a faucet that is 20 m above the ground?

(Multiple Choice)

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Question 79

The water level in a water tower is 50.00 m above the ground.What is the gauge pressure of the water at a faucet that is 2.000 m above the ground?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 87

Exam 9: Fluids

Water flows in a flexible tube of radius 1.5 cm at the floor level of a house.If the tube is joined to a second tube of smaller radius (1.2 cm),what is the speed of water in this smaller radius tube at a height of 7.2 m above the floor?

A mercury manometer measures a pressure of 200.0 mmHg.What is this pressure in Pa?

The surface tension of soapy water is 0.0250 N/m.What is the height of the water in a capillary tube of diameter 2.00 mm?

A small hole is cut in the bottom of a water storage tank.The initial depth of the water is 8.00 m.If the diameter of the small hole in the bottom of the tank is 1.00 cm,then what is the flow rate of the water leaving the tank?

What is the density of a mixture of 90% air (density air 1.20 kg/m3) and 10% helium (density of 0.180 kg/m3)?

A viscous fluid is flowing through a small tube at a rate of 0.200 m3/s.If the pressure difference between one end of the tube and the other is doubled,the length is halved and the radius is also doubled,then what is the rate of flow of the fluid?

The pressure at what depth in seawater (1025 kg/m3)is equivalent to that at a depth of 10.0 m in fresh water (1000 kg/m3)?

A ball naturally floats with 35% of its volume above the surface of a pool filled with mercury (density 13600 kg/m3).If a force of 1200 N is required to force the ball completely under water,what is the radius of the ball?

What is the force on the top surface of a 10.5 cm-diameter soup can that is submerged in 350 m of seawater,whose density is 1017 kg/m3? The air pressure outside is 101.5 kPa.

The difference in blood pressure between the head and the foot of a person who is 2.000 m tall and resting on an incline that is at an angle of 30.00 degrees to the horizontal is (density of blood is 1,060 kg/m3)

A 10.0 kg ball weighs 98.0 N in air and weighs 65.0 N when submerged in water.The volume of the ball is

The water level in a water tower is 50 m above the ground.What is the gauge pressure of the water at a faucet that is 20 m above the ground?

The water level in a water tower is 50.00 m above the ground.What is the gauge pressure of the water at a faucet that is 2.000 m above the ground?

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What is the density of a mixture of 90% air (density air 1.20 kg/m³) and 10% helium (density of 0.180 kg/m³)?

A viscous fluid is flowing through a small tube at a rate of 0.200 m³/s.If the pressure difference between one end of the tube and the other is doubled,the length is halved and the radius is also doubled,then what is the rate of flow of the fluid?

The pressure at what depth in seawater (1025 kg/m³)is equivalent to that at a depth of 10.0 m in fresh water (1000 kg/m³)?

A ball naturally floats with 35% of its volume above the surface of a pool filled with mercury (density 13600 kg/m³).If a force of 1200 N is required to force the ball completely under water,what is the radius of the ball?

What is the force on the top surface of a 10.5 cm-diameter soup can that is submerged in 350 m of seawater,whose density is 1017 kg/m³? The air pressure outside is 101.5 kPa.

The difference in blood pressure between the head and the foot of a person who is 2.000 m tall and resting on an incline that is at an angle of 30.00 degrees to the horizontal is (density of blood is 1,060 kg/m³)