A barge with vertical sides is 10 m wide and 60 m long and is floating in fresh water of density 1000 kg/m3. How much deeper into the water does the barge sink when 3.0 x 105 kg of coal are loaded on the barge?

A) 25 cm B) 50 cm C) 75 cm D) 1.0 m E) 1.5 m A) 25 cm B) 50 cm C) 75 cm D) 1.0 m E) 1.5 m

A person weighing 900 N is standing on snowshoes. Each snowshoe has area 2500 cm2 and has negligible weight. What pressure does this person's weight exert on the snow?

A) 0.18 N/m2 B) 0.36 N/m2 C) 1800 N/m2 D) 3600 N/m2 A) 0.18 N/m2 B) 0.36 N/m2 C) 1800 N/m2 D) 3600 N/m2

The Tonga Trench in the Pacific Ocean is 36,000 feet deep. Assuming that sea water has an average density of 1.04 g/cm3, calculate the absolute (total) pressure at the bottom of the trench in atmospheres. (1.00 in = 2.54 cm, 1.00 atm = 1.01 × 105 Pa)

A) 1.1 × 103 atm B) 1.1 × 108 atm C) 1.1 × 105 atm D) 1.1 × 106 atm E) 2.1 atm A) 1.1 × 103 atm B) 1.1 × 108 atm C) 1.1 × 105 atm D) 1.1 × 106 atm E) 2.1 atm

A 500-N weight sits on the small piston of a hydraulic machine. The small piston has an area of 2.0 cm2. If the large piston has an area of 40 cm2, how much weight can the large piston support? Assume the pistons each have negligible weight.

A) 25 N B) 500 N C) 10000 N D) 40000 N A) 25 N B) 500 N C) 10000 N D) 40000 N

Exam 13: Fluids

A barge with vertical sides is 10 m wide and 60 m long and is floating in fresh water of density 1000 kg/m³. How much deeper into the water does the barge sink when 3.0 x 10⁵ kg of coal are loaded on the barge?

(Multiple Choice)

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Question 61

A steel ball sinks in water but floats in a pool of mercury, which is much denser than water. Where is the buoyant force on the ball greater?

(Multiple Choice)

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Question 62

A person weighing 900 N is standing on snowshoes. Each snowshoe has area 2500 cm² and has negligible weight. What pressure does this person's weight exert on the snow?

(Multiple Choice)

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(75)

Question 63

The Tonga Trench in the Pacific Ocean is 36,000 feet deep. Assuming that sea water has an average density of 1.04 g/cm³, calculate the absolute (total) pressure at the bottom of the trench in atmospheres. (1.00 in = 2.54 cm, 1.00 atm = 1.01 × 10⁵^Pa)

(Multiple Choice)

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Question 64

A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. If the top piece is taken off and placed in the water, what happens to the water level in the tub?

(Multiple Choice)

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Question 65

Two horizontal pipes are the same length, but pipe B has twice the diameter of pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe A is Q = $\frac { \Delta V } { \Delta t }$ , what is the flow rate in pipe B?

(Multiple Choice)

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Question 66

A block of metal weighs 40 N in air and 30 N in water. What is the buoyant force on the block due to the water? The density of water is 1000 kg/m³.

(Multiple Choice)

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Question 67

An object floats with half its volume beneath the surface of the water. The weight of the displaced water is 2000 N. What is the weight of the object? The density of water is 1000 kg/m³.

(Multiple Choice)

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Question 68

A hollow steel ball of diameter 3.0 m just barely floats in water. What is the wall thickness of the ball? (ρ_Fe = 7.87 g/cm³, ρ_water= 1.00 g/cm³)

(Multiple Choice)

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Question 69

A 13,000-N vehicle is to be lifted by a 25-cm diameter hydraulic piston. What force needs to be applied to a 5.0 cm diameter piston to accomplish this? Assume the pistons each have negligible weight.

(Multiple Choice)

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Question 70

An object weighs 7.84 N when it is in air and 6.86 N when it is immersed in water of density 1000 kg/m³. What is the density of the object?

(Multiple Choice)

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Question 71

A cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. Which one of the following graphs best describes the buoyant force B on this block as a function of time t if the block just enters the water at time t = 0 s?

(Multiple Choice)

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Question 72

A pressurized cylindrical tank, 5.0 m in diameter, contains water that emerges from the pipe at point C with a speed of $84 \mathrm {~m} / \mathrm { s }$ as shown in the figure. Point A is 10 m above point B and point C is 3.0 m above point B. The area of the pipe at point B is $0.080 \mathrm {~m} ^ { 2 }$ and the pipe narrows to an area of $0.070 \mathrm {~m} ^ { 2 }$ at point C. Assume that the water is an ideal fluid in laminar flow. The density of water is 1000 kg/m³. The rate at which the water level is falling in the tank is closest to $A pressurized cylindrical tank, 5.0 m in diameter, contains water that emerges from the pipe at point C with a speed of 84 \mathrm {~m} / \mathrm { s } as shown in the figure. Point A is 10 m above point B and point C is 3.0 m above point B. The area of the pipe at point B is 0.080 \mathrm {~m} ^ { 2 } and the pipe narrows to an area of 0.070 \mathrm {~m} ^ { 2 } at point C. Assume that the water is an ideal fluid in laminar flow. The density of water is 1000 kg/m<sup>3</sup>. The rate at which the water level is falling in the tank is closest to$

(Multiple Choice)

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Question 73

When you blow some air above a paper strip, the paper rises. This happens because

(Multiple Choice)

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Question 74

A 500-N weight sits on the small piston of a hydraulic machine. The small piston has an area of 2.0 cm². If the large piston has an area of 40 cm², how much weight can the large piston support? Assume the pistons each have negligible weight.

(Multiple Choice)

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Question 75

When a box rests on a round sheet of wood on the ground, it exerts an average pressure p on the wood. If the wood is replaced by a sheet that has half the diameter of the original piece, what is the new average pressure?

(Multiple Choice)

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Question 76

Ideal incompressible fluid flows through a 4.0-cm-diameter pipe at 1.0 m/s. There is a 2.0 cm diameter constriction in the line. What is the speed of the fluid in this constriction?

(Multiple Choice)

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Question 77

Two horizontal pipes have the same diameter, but pipe B is twice as long as pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe B is Q = $\frac { \Delta V } { \Delta t }$ what is the flow rate in pipe A?

(Multiple Choice)

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(72)

Question 78

Water flows through a horizontal pipe of cross-sectional area 10.0 cm² at a pressure of 0.250 atm with a flow rate is 1.00 L/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.00 cm². What is the pressure at the valve? The density of water is 1000 kg/m³, and treat it as an ideal incompressible fluid.

(Multiple Choice)

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Question 79

A solid object floats in water with three-fourths of its volume beneath the surface. What is the object's density? The density of water is 1000 kg/m³.

(Multiple Choice)

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Question 80

Showing 61 - 80 of 115

Exam 13: Fluids

A barge with vertical sides is 10 m wide and 60 m long and is floating in fresh water of density 1000 kg/m3. How much deeper into the water does the barge sink when 3.0 x 105 kg of coal are loaded on the barge?

A steel ball sinks in water but floats in a pool of mercury, which is much denser than water. Where is the buoyant force on the ball greater?

A person weighing 900 N is standing on snowshoes. Each snowshoe has area 2500 cm2 and has negligible weight. What pressure does this person's weight exert on the snow?

The Tonga Trench in the Pacific Ocean is 36,000 feet deep. Assuming that sea water has an average density of 1.04 g/cm3, calculate the absolute (total) pressure at the bottom of the trench in atmospheres. (1.00 in = 2.54 cm, 1.00 atm = 1.01 × 105 Pa)

A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. If the top piece is taken off and placed in the water, what happens to the water level in the tub?

A block of metal weighs 40 N in air and 30 N in water. What is the buoyant force on the block due to the water? The density of water is 1000 kg/m3.

An object floats with half its volume beneath the surface of the water. The weight of the displaced water is 2000 N. What is the weight of the object? The density of water is 1000 kg/m3.

A hollow steel ball of diameter 3.0 m just barely floats in water. What is the wall thickness of the ball? (ρFe = 7.87 g/cm3, ρwater = 1.00 g/cm3)

A 13,000-N vehicle is to be lifted by a 25-cm diameter hydraulic piston. What force needs to be applied to a 5.0 cm diameter piston to accomplish this? Assume the pistons each have negligible weight.

An object weighs 7.84 N when it is in air and 6.86 N when it is immersed in water of density 1000 kg/m3. What is the density of the object?

A cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. Which one of the following graphs best describes the buoyant force B on this block as a function of time t if the block just enters the water at time t = 0 s?

When you blow some air above a paper strip, the paper rises. This happens because

A 500-N weight sits on the small piston of a hydraulic machine. The small piston has an area of 2.0 cm2. If the large piston has an area of 40 cm2, how much weight can the large piston support? Assume the pistons each have negligible weight.

When a box rests on a round sheet of wood on the ground, it exerts an average pressure p on the wood. If the wood is replaced by a sheet that has half the diameter of the original piece, what is the new average pressure?

Ideal incompressible fluid flows through a 4.0-cm-diameter pipe at 1.0 m/s. There is a 2.0 cm diameter constriction in the line. What is the speed of the fluid in this constriction?

A solid object floats in water with three-fourths of its volume beneath the surface. What is the object's density? The density of water is 1000 kg/m3.

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A barge with vertical sides is 10 m wide and 60 m long and is floating in fresh water of density 1000 kg/m³. How much deeper into the water does the barge sink when 3.0 x 10⁵ kg of coal are loaded on the barge?

A person weighing 900 N is standing on snowshoes. Each snowshoe has area 2500 cm² and has negligible weight. What pressure does this person's weight exert on the snow?

The Tonga Trench in the Pacific Ocean is 36,000 feet deep. Assuming that sea water has an average density of 1.04 g/cm³, calculate the absolute (total) pressure at the bottom of the trench in atmospheres. (1.00 in = 2.54 cm, 1.00 atm = 1.01 × 10⁵^Pa)

A block of metal weighs 40 N in air and 30 N in water. What is the buoyant force on the block due to the water? The density of water is 1000 kg/m³.

An object floats with half its volume beneath the surface of the water. The weight of the displaced water is 2000 N. What is the weight of the object? The density of water is 1000 kg/m³.

A hollow steel ball of diameter 3.0 m just barely floats in water. What is the wall thickness of the ball? (ρ_Fe = 7.87 g/cm³, ρ_water= 1.00 g/cm³)

An object weighs 7.84 N when it is in air and 6.86 N when it is immersed in water of density 1000 kg/m³. What is the density of the object?

A 500-N weight sits on the small piston of a hydraulic machine. The small piston has an area of 2.0 cm². If the large piston has an area of 40 cm², how much weight can the large piston support? Assume the pistons each have negligible weight.

A solid object floats in water with three-fourths of its volume beneath the surface. What is the object's density? The density of water is 1000 kg/m³.