A Boeing 737 airliner has a mass of 20 000 kg and the total area of both wings (top or bottom) is 100 m2. What is the pressure difference between the top and bottom surface of each wing when the airplane is in flight at a constant altitude?

A) 1 960 N/m2 B) 3 920 N/m2 C) 7 840 N/m2 D) 4 560 N/m2 E) 3 070 N/m2 A) 1 960 N/m2 B) 3 920 N/m2 C) 7 840 N/m2 D) 4 560 N/m2 E) 3 070 N/m2

In a wind tunnel the pressure on the top surface of a model airplane wing is 8.8 *104 N/m and the pressure on the bottom surface is 9.0 * 104 N/m2. If the area of the top and bottom surfaces of each wing is 2.0 m2, what is the total lift on the model airplane?

A) 2.0 *103 N B) 8.0 * 103 N C) 1.6 * 104 N D) 3.6 * 104 N E) 1.0 * 103 N A) 2.0 *103 N B) 8.0 * 103 N C) 1.6 * 104 N D) 3.6 * 104 N E) 1.0 * 103 N

Exam 14: Fluid Dynamics

Imagine that you have been given the job of designing a fountain to be the centrepiece of a new shopping mall on the Gold Coast. The fountain will consist of a single upward jet of water, launched from a pipe of radius 2 mm and length 1.2 m. The pipe is fed by recycled water, pushed by a pump which produces a pressure difference of 50 000 Pa. How high will the water in the fountain go? The viscosity of water is 0.001 Pa s, and g = 9.8 m s-2.

(Multiple Choice)

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Question 21

The water supply to an old suburb in Perth is no longer adequate, and the water company is planning to put in a higher capacity supply. Which of the following options would give the biggest increase in the water flow into the suburb?

(Multiple Choice)

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Question 22

You have been asked to modify the nozzle of a rocket engine. The existing rocket produces a laminar flow of exhaust gasses, but is not powerful enough to lift a new generation of communication satellites. You have been asked to advise on the best way to increase the thrust without causing the flow to become turbulent. The rocket thrust is proportional to the density of the exhaust, to its velocity, and to the square of the nozzle diameter. What is the best approach?

(Multiple Choice)

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Question 23

What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1000 m? (The pressure inside the bathysphere is, hopefully, 1 ATM.) $\rho$ (sea water) = 1.02 *103 kg/m3.

(Multiple Choice)

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Question 24

A sphere of radius 1 cm is moving through a vat of corn syrup, which has a viscosity of 1.4 Pa s. A force of 0.01 N is needed to keep it moving at a constant speed. What is the speed? You may assume that Stokes' law applies.

(Multiple Choice)

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Question 25

Air within the funnel of a large tornado may have a pressure of only 0.2 ATM. What is the approximate outward force on a (5 m * 10 m) wall if a tornado suddenly envelops the house? (1 ATM = 1.01*105 N/m².)

(Multiple Choice)

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Question 26

A Boeing 737 airliner has a mass of 20 000 kg and the total area of both wings (top or bottom) is 100 m². What is the pressure difference between the top and bottom surface of each wing when the airplane is in flight at a constant altitude?

(Multiple Choice)

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Question 27

How much power is theoretically available from a mass flow of 1000 kg/s of water when it falls a vertical distance of 100 metres?

(Multiple Choice)

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Question 28

A venturi tube may be used as the inlet to an automobile carburettor. If the 2.0-cm diameter pipe narrows to a 1.0-cm diameter, what is the pressure drop in the constricted section for an airflow of 3.0 m/s in the 2.0-cm section? ( $\rho$ = 1.2 kg/m3.)

(Multiple Choice)

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Question 29

A fountain sends water to a height of 100 metres. What must be the pressurisation (above atmospheric) of the water system? 1 ATM = 1.01 *105 N/m².

(Multiple Choice)

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Question 30

An evaporative cooling unit needs to pump 100 litres of air per second through a pipe of radius 10 cm and length 10 m. How much of a pressure difference must be applied to the air to produce this flow rate? The viscosity of air is 1.8x10-5 Pa s.

(Multiple Choice)

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Question 31

The water level in a reservoir is maintained at a constant level. What is the exit velocity in an outlet pipe 3.0 m below the water surface?

(Multiple Choice)

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Question 32

A fountain sends a stream of water 20.0 m up into the air. If the base of the stream is 10.0 cm in diameter, what power is required to send the water to this height?

(Short Answer)

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Question 33

Water is flowing at 4.0 m/s in a circular pipe. If the diameter of the pipe decreases to 1/2 its former value, what is the velocity of the water downstream?

(Multiple Choice)

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Question 34

In a wind tunnel the pressure on the top surface of a model airplane wing is 8.8 104 N/m and the pressure on the bottom surface is 9.0 104 N/m². If the area of the top and bottom surfaces of each wing is 2.0 m², what is the total lift on the model airplane?

(Multiple Choice)

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Question 35

Showing 21 - 35 of 35

The water supply to an old suburb in Perth is no longer adequate, and the water company is planning to put in a higher capacity supply. Which of the following options would give the biggest increase in the water flow into the suburb?

What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1000 m? (The pressure inside the bathysphere is, hopefully, 1 ATM.) $\rho$ (sea water) = 1.02 *103 kg/m3.

A sphere of radius 1 cm is moving through a vat of corn syrup, which has a viscosity of 1.4 Pa s. A force of 0.01 N is needed to keep it moving at a constant speed. What is the speed? You may assume that Stokes' law applies.

Air within the funnel of a large tornado may have a pressure of only 0.2 ATM. What is the approximate outward force on a (5 m * 10 m) wall if a tornado suddenly envelops the house? (1 ATM = 1.01*105 N/m².)

A Boeing 737 airliner has a mass of 20 000 kg and the total area of both wings (top or bottom) is 100 m². What is the pressure difference between the top and bottom surface of each wing when the airplane is in flight at a constant altitude?

How much power is theoretically available from a mass flow of 1000 kg/s of water when it falls a vertical distance of 100 metres?

A venturi tube may be used as the inlet to an automobile carburettor. If the 2.0-cm diameter pipe narrows to a 1.0-cm diameter, what is the pressure drop in the constricted section for an airflow of 3.0 m/s in the 2.0-cm section? ( $\rho$ = 1.2 kg/m3.)

A fountain sends water to a height of 100 metres. What must be the pressurisation (above atmospheric) of the water system? 1 ATM = 1.01 *105 N/m².

An evaporative cooling unit needs to pump 100 litres of air per second through a pipe of radius 10 cm and length 10 m. How much of a pressure difference must be applied to the air to produce this flow rate? The viscosity of air is 1.8x10-5 Pa s.

The water level in a reservoir is maintained at a constant level. What is the exit velocity in an outlet pipe 3.0 m below the water surface?

A fountain sends a stream of water 20.0 m up into the air. If the base of the stream is 10.0 cm in diameter, what power is required to send the water to this height?

Water is flowing at 4.0 m/s in a circular pipe. If the diameter of the pipe decreases to 1/2 its former value, what is the velocity of the water downstream?

In a wind tunnel the pressure on the top surface of a model airplane wing is 8.8 104 N/m and the pressure on the bottom surface is 9.0 104 N/m². If the area of the top and bottom surfaces of each wing is 2.0 m², what is the total lift on the model airplane?

Physics and Measurement

Motion in One Dimension

Motion in Two Dimensions

Forces and Newtons Laws

Further Applications of Newtons Laws

Work, Force and Energy

Conservation of Energy

Linear Momentum and Collisions

Rotational Motion

Energy and Momentum in Rotating Systems

Gravity

Special Relativity

Fluid Statics

Solids

Oscillatory Motion

Wave Motion

Superposition and Interference

Heat and Temperature

Energy Transfer Processes and Thermodynamics

The Kinetic Theory of Gases

The Second Law of Thermodynamics, Heat Engines and Entropy

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Exam 14: Fluid Dynamics

The water supply to an old suburb in Perth is no longer adequate, and the water company is planning to put in a higher capacity supply. Which of the following options would give the biggest increase in the water flow into the suburb?

What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1000 m? (The pressure inside the bathysphere is, hopefully, 1 ATM.) ρ\rhoρ (sea water) = 1.02 *103 kg/m3.

A sphere of radius 1 cm is moving through a vat of corn syrup, which has a viscosity of 1.4 Pa s. A force of 0.01 N is needed to keep it moving at a constant speed. What is the speed? You may assume that Stokes' law applies.

Air within the funnel of a large tornado may have a pressure of only 0.2 ATM. What is the approximate outward force on a (5 m * 10 m) wall if a tornado suddenly envelops the house? (1 ATM = 1.01*105 N/m2.)

A Boeing 737 airliner has a mass of 20 000 kg and the total area of both wings (top or bottom) is 100 m2. What is the pressure difference between the top and bottom surface of each wing when the airplane is in flight at a constant altitude?

How much power is theoretically available from a mass flow of 1000 kg/s of water when it falls a vertical distance of 100 metres?

A venturi tube may be used as the inlet to an automobile carburettor. If the 2.0-cm diameter pipe narrows to a 1.0-cm diameter, what is the pressure drop in the constricted section for an airflow of 3.0 m/s in the 2.0-cm section? ( ρ\rhoρ = 1.2 kg/m3.)

A fountain sends water to a height of 100 metres. What must be the pressurisation (above atmospheric) of the water system? 1 ATM = 1.01 *105 N/m2.

An evaporative cooling unit needs to pump 100 litres of air per second through a pipe of radius 10 cm and length 10 m. How much of a pressure difference must be applied to the air to produce this flow rate? The viscosity of air is 1.8x10-5 Pa s.

The water level in a reservoir is maintained at a constant level. What is the exit velocity in an outlet pipe 3.0 m below the water surface?

A fountain sends a stream of water 20.0 m up into the air. If the base of the stream is 10.0 cm in diameter, what power is required to send the water to this height?

Water is flowing at 4.0 m/s in a circular pipe. If the diameter of the pipe decreases to 1/2 its former value, what is the velocity of the water downstream?

In a wind tunnel the pressure on the top surface of a model airplane wing is 8.8 *104 N/m and the pressure on the bottom surface is 9.0 * 104 N/m2. If the area of the top and bottom surfaces of each wing is 2.0 m2, what is the total lift on the model airplane?

Physics and Measurement

Motion in One Dimension

Motion in Two Dimensions

Forces and Newtons Laws

Further Applications of Newtons Laws

Work, Force and Energy

Conservation of Energy

Linear Momentum and Collisions

Rotational Motion

Energy and Momentum in Rotating Systems

Gravity

Special Relativity

Fluid Statics

Solids

Oscillatory Motion

Wave Motion

Superposition and Interference

Heat and Temperature

Energy Transfer Processes and Thermodynamics

The Kinetic Theory of Gases

The Second Law of Thermodynamics, Heat Engines and Entropy

Filters

What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1000 m? (The pressure inside the bathysphere is, hopefully, 1 ATM.) $\rho$ (sea water) = 1.02 *103 kg/m3.

Air within the funnel of a large tornado may have a pressure of only 0.2 ATM. What is the approximate outward force on a (5 m * 10 m) wall if a tornado suddenly envelops the house? (1 ATM = 1.01*105 N/m².)

A Boeing 737 airliner has a mass of 20 000 kg and the total area of both wings (top or bottom) is 100 m². What is the pressure difference between the top and bottom surface of each wing when the airplane is in flight at a constant altitude?

A venturi tube may be used as the inlet to an automobile carburettor. If the 2.0-cm diameter pipe narrows to a 1.0-cm diameter, what is the pressure drop in the constricted section for an airflow of 3.0 m/s in the 2.0-cm section? ( $\rho$ = 1.2 kg/m3.)

A fountain sends water to a height of 100 metres. What must be the pressurisation (above atmospheric) of the water system? 1 ATM = 1.01 *105 N/m².

In a wind tunnel the pressure on the top surface of a model airplane wing is 8.8 104 N/m and the pressure on the bottom surface is 9.0 104 N/m². If the area of the top and bottom surfaces of each wing is 2.0 m², what is the total lift on the model airplane?