Question 1

Consider a very small hole in the bottom of a tank 20.0 cm in diameter filled with water to a height of 50.0 cm.Find the speed at which the water exits the tank through the hole.

Accepted Answer

A) 3.13 m/s 
B) 9.80 m/s 
C) 31.8 m/s 
D) 34.9 m/s 
A) 3.13 m/s 
B) 9.80 m/s 
C) 31.8 m/s 
D) 34.9 m/s

Question 2

A hollow steel ball of diameter 3 m barely floats in water.What is the wall thickness of the ball? (ρFe = 7.87 g/cm3)

Accepted Answer

A) 6.6 cm 
B) 37 cm 
C) 131 cm 
D) 79 cm 
A) 6.6 cm 
B) 37 cm 
C) 131 cm 
D) 79 cm

Question 3

According to Pascal's principle,if you increase the pressure enough so that the force at one end of an oil-filled tube increases by 10 N,the force will increase at all points in the tube by 10 N.

Accepted Answer

A) True 
 B)False

Question 4

A rectangular wooden block measures 10.0 cm × 4.00 cm × 2.00 cm.When the block is placed in water,it floats horizontally,with its bottom face 1.65 cm below the surface.What is the density of the wood?

Accepted Answer

A) 0.825 g/cm3 
B) 1.21 g/cm3 
C) 1.65 g/cm3 
D) 0.606 g/cm3 
E) 0.350 g/cm3 
A) 0.825 g/cm3 
B) 1.21 g/cm3 
C) 1.65 g/cm3 
D) 0.606 g/cm3 
E) 0.350 g/cm3

Question 5

A compressed gas with a total mass of 203 kg is stored in a spherical container that has a radius of 0.521 m.What is the density of the compressed gas?

Accepted Answer

A) 343 kg/m3 
B) 209 kg/m3 
C) 254 kg/m3 
D) 305 kg/m3 
A) 343 kg/m3 
B) 209 kg/m3 
C) 254 kg/m3 
D) 305 kg/m3

Question 6

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value.If the speed of the water in the larger section of the pipe was 32 m/s,what is its speed in this smaller section?

Accepted Answer

A) 43 m/s 
B) 37 m/s 
C) 28 m/s 
D) 24 m/s 
A) 43 m/s 
B) 37 m/s 
C) 28 m/s 
D) 24 m/s

Question 7

One of the dangers of tornados and hurricanes is the rapid drop in air pressure that is associated with such storms.Assume that the air pressure inside of a sealed house is 1.02 atm when a hurricane hits.The hurricane rapidly decreases the external air pressure to 0.910 atm.What net force (directed outwards)is exerted on a 2.02 m square window on the house?

Accepted Answer

A) 4.55 × 104 N 
B) 5.14 × 104 N 
C) 4.78 × 105 N 
D) 5.37 × 105 N 
A) 4.55 × 104 N 
B) 5.14 × 104 N 
C) 4.78 × 105 N 
D) 5.37 × 105 N

Question 8

How much would a lead brick 2.0 in × 2.0 in × 8.0 in weigh if placed in oil with density ρ = 0.92 g/cm3? (ρPb = 11.4 g/cm3)

Accepted Answer

A) 5.5 kg 
B) 0.34 kg 
C) 6 kg 
D) 0.48 kg 
A) 5.5 kg 
B) 0.34 kg 
C) 6 kg 
D) 0.48 kg

Question 9

A pump uses a piston of 15 cm diameter which moves 2 cm/s.What is the fluid velocity of a tube 3 mm in diameter?

Accepted Answer

A) 50 m/s 
B) 50 cm/s 
C) 6 cm/s 
D) 22 cm/s 
A) 50 m/s 
B) 50 cm/s 
C) 6 cm/s 
D) 22 cm/s

Question 10

A 4.7 kg solid sphere,made of metal whose density is 4000 kg/m3,is suspended by a cord.The density of water is 1000 kg/m3.When the sphere is immersed in water,the tension in the cord is closest to:

Accepted Answer

A) 35 N 
B) 40 N 
C) 46 N 
D) 52 N 
E) 58 N 
A) 35 N 
B) 40 N 
C) 46 N 
D) 52 N 
E) 58 N

Question 11

The Bernoulli effect is described by the equation 
 
The origin of this relation is that it is a statement of

Accepted Answer

A) the conservation of linear momentum. 
B) Newton's Third Law,i.e. ,equal action and reaction. 
C) the conservation of energy for a moving fluid. 
D) the continuity principle for fluids. 
E) F = ma as applied to a fluid. 
A) the conservation of linear momentum. 
B) Newton's Third Law,i.e. ,equal action and reaction. 
C) the conservation of energy for a moving fluid. 
D) the continuity principle for fluids. 
E) F = ma as applied to a fluid.

Consider a very small hole in the bottom of a tank 20.0 cm in diameter filled with water to a height of 50.0 cm.Find the speed at which the water exits the tank through the hole.

A hollow steel ball of diameter 3 m barely floats in water.What is the wall thickness of the ball? (ρFe = 7.87 g/cm³)

According to Pascal's principle,if you increase the pressure enough so that the force at one end of an oil-filled tube increases by 10 N,the force will increase at all points in the tube by 10 N.

A rectangular wooden block measures 10.0 cm × 4.00 cm × 2.00 cm.When the block is placed in water,it floats horizontally,with its bottom face 1.65 cm below the surface.What is the density of the wood?

A compressed gas with a total mass of 203 kg is stored in a spherical container that has a radius of 0.521 m.What is the density of the compressed gas?

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value.If the speed of the water in the larger section of the pipe was 32 m/s,what is its speed in this smaller section?

How much would a lead brick 2.0 in × 2.0 in × 8.0 in weigh if placed in oil with density ρ = 0.92 g/cm³? (ρPb = 11.4 g/cm³)

A pump uses a piston of 15 cm diameter which moves 2 cm/s.What is the fluid velocity of a tube 3 mm in diameter?

A 4.7 kg solid sphere,made of metal whose density is 4000 kg/m3,is suspended by a cord.The density of water is 1000 kg/m³.When the sphere is immersed in water,the tension in the cord is closest to:

The Bernoulli effect is described by the equation The origin of this relation is that it is a statement of

Representing Motion

Motion in One Dimension

Vectors and Motion in Two Dimensions

Forces and Newtons Laws of Motion

Applying Newtons Laws

Circular Motion,orbits,and Gravity

Rotational Motion

Equilibrium and Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Magnetic Fields and Forces

Electromagnetic Induction and Electromagnetic Waves

Ac Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters

Exam 13: Fluids

Consider a very small hole in the bottom of a tank 20.0 cm in diameter filled with water to a height of 50.0 cm.Find the speed at which the water exits the tank through the hole.

A hollow steel ball of diameter 3 m barely floats in water.What is the wall thickness of the ball? (ρFe = 7.87 g/cm3)

According to Pascal's principle,if you increase the pressure enough so that the force at one end of an oil-filled tube increases by 10 N,the force will increase at all points in the tube by 10 N.

A rectangular wooden block measures 10.0 cm × 4.00 cm × 2.00 cm.When the block is placed in water,it floats horizontally,with its bottom face 1.65 cm below the surface.What is the density of the wood?

A compressed gas with a total mass of 203 kg is stored in a spherical container that has a radius of 0.521 m.What is the density of the compressed gas?

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value.If the speed of the water in the larger section of the pipe was 32 m/s,what is its speed in this smaller section?

How much would a lead brick 2.0 in × 2.0 in × 8.0 in weigh if placed in oil with density ρ = 0.92 g/cm3? (ρPb = 11.4 g/cm3)

A pump uses a piston of 15 cm diameter which moves 2 cm/s.What is the fluid velocity of a tube 3 mm in diameter?

A 4.7 kg solid sphere,made of metal whose density is 4000 kg/m3,is suspended by a cord.The density of water is 1000 kg/m3.When the sphere is immersed in water,the tension in the cord is closest to:

The Bernoulli effect is described by the equation The origin of this relation is that it is a statement of

Representing Motion

Motion in One Dimension

Vectors and Motion in Two Dimensions

Forces and Newtons Laws of Motion

Applying Newtons Laws

Circular Motion,orbits,and Gravity

Rotational Motion

Equilibrium and Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Magnetic Fields and Forces

Electromagnetic Induction and Electromagnetic Waves

Ac Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters

A hollow steel ball of diameter 3 m barely floats in water.What is the wall thickness of the ball? (ρFe = 7.87 g/cm³)

How much would a lead brick 2.0 in × 2.0 in × 8.0 in weigh if placed in oil with density ρ = 0.92 g/cm³? (ρPb = 11.4 g/cm³)

A 4.7 kg solid sphere,made of metal whose density is 4000 kg/m3,is suspended by a cord.The density of water is 1000 kg/m³.When the sphere is immersed in water,the tension in the cord is closest to: