Question 1

If the column of mercury in a barometer stands at 73.8 cm,what is the atmospheric pressure? (The density of mercury is 13.6 × 103 kg/m3 and g = 9.80 m/s2)

Accepted Answer

A)  0.984 × 105 N/m2 
B)  98.361 × 105 N/m2 
C)  1.184 × 105 N/m2 
D)  0.018 × 105 N/m2 
E)  ​1.024 × 105 N/m2 
A)  0.984 × 105 N/m2 
B)  98.361 × 105 N/m2 
C)  1.184 × 105 N/m2 
D)  0.018 × 105 N/m2 
E)  ​1.024 × 105 N/m2 A

Question 2

How much power is theoretically available from a mass flow of 1 200 kg/s of water that falls a vertical distance of 110 m?

Accepted Answer

A)  1 294 kW 
B)  132 kW 
C)  129 W 
D)  1 299 W 
E)  ​1 294 W 
A)  1 294 kW 
B)  132 kW 
C)  129 W 
D)  1 299 W 
E)  ​1 294 W A

Question 3

A large stone is resting on the bottom of the swimming pool.The normal force of the bottom of the pool on the stone is equal to the:

Accepted Answer

A)  weight of the stone. 
B)  weight of the water displaced. 
C)  sum of the weight of the stone and the weight of the displaced water. 
D)  difference between the weight of the stone and the weight of the displaced water. 
A)  weight of the stone. 
B)  weight of the water displaced. 
C)  sum of the weight of the stone and the weight of the displaced water. 
D)  difference between the weight of the stone and the weight of the displaced water. D

Question 4

How large a force is necessary to stretch a 1-mm-diameter steel wire (Y = 2.0 × 1011 N/m2)by 8.0%?

Accepted Answer

A)  19.0 × 103 N 
B)  12.6 × 103 N 
C)  12.3 × 103 N 
D)  25.1 × 104 N 
E)  ​12.6 × 104 N 
A)  19.0 × 103 N 
B)  12.6 × 103 N 
C)  12.3 × 103 N 
D)  25.1 × 104 N 
E)  ​12.6 × 104 N

Question 5

A solid object is made of two materials,one material having density of 2 000 kg/m3 and the other having density of 5 000 kg/m3.If the object contains equal volumes of the materials,what is its average density?

Accepted Answer

A)  2 857 kg/m3 
B)  3 500 kg/m3 
C)  4 500 kg/m3 
D)  7 000 kg/m3 
E)  ​more information is needed 
A)  2 857 kg/m3 
B)  3 500 kg/m3 
C)  4 500 kg/m3 
D)  7 000 kg/m3 
E)  ​more information is needed

Question 6

In a large tank of liquid,the hydrostatic pressure at a given depth is a function of:

Accepted Answer

A)  depth. 
B)  surface area. 
C)  liquid density. 
D)  Choices a and c are both valid. 
A)  depth. 
B)  surface area. 
C)  liquid density. 
D)  Choices a and c are both valid.

Question 7

An ideal fluid,of density 0.85 × 103 kg/m3,flows at 0.28 kg/s through a pipe of radius 0.017 m.What is the fluid speed?

Accepted Answer

A)  3.34 m/s 
B)  0.0031 m/s 
C)  308.4 m/s 
D)  0.36 m/s​ 
E)  ​1.3 m/s 
A)  3.34 m/s 
B)  0.0031 m/s 
C)  308.4 m/s 
D)  0.36 m/s​ 
E)  ​1.3 m/s

Question 8

When water freezes,it expands about nine percent.What would be the pressure increase inside your automobile engine block if the water in there froze? (The bulk modulus of ice is 2.0 × 109 Pa,and 1 atm = 1.0 × 105 Pa. )

Accepted Answer

A)  18 atm 
B)  270 atm 
C)  1 080 atm 
D)  1 800 atm 
A)  18 atm 
B)  270 atm 
C)  1 080 atm 
D)  1 800 atm

Question 9

Spherical particles of density 2.0 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N⋅s/m3).The water is 7.0 cm deep and is allowed to stand for 30 minutes.What is the greatest terminal velocity of the particles still in suspension at that time?
​

Accepted Answer

A)  2 × 10−5 m/s 
B)  2.9 × 10−5 m/s 
C)  4.9 × 10−5 m/s 
D)  3.9 × 10−5 m/s 
E)  ​5.5 × 10−5 m/s 
A)  2 × 10−5 m/s 
B)  2.9 × 10−5 m/s 
C)  4.9 × 10−5 m/s 
D)  3.9 × 10−5 m/s 
E)  ​5.5 × 10−5 m/s

Question 10

Water (density = 1 × 103 kg/m3)flows at 15 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building,3.0 m higher,and the pressure remains unchanged.What is the speed of the water flow in the pipe on the second floor?

Accepted Answer

A)  13 m/s 
B)  17 m/s 
C)  166 m/s 
D)  14 m/s 
E)  ​6 m/s 
A)  13 m/s 
B)  17 m/s 
C)  166 m/s 
D)  14 m/s 
E)  ​6 m/s

Question 11

The Greenland ice sheet can be one km thick.Estimate the pressure underneath the ice.(The density of ice is 918 kg/m3. )

Accepted Answer

A)  9.0 × 105 Pa (9 atm) 
B)  2.5 × 106 Pa (25 atm) 
C)  4.5 × 106 Pa (45 atm) 
D)  9.0 × 106 Pa (90 atm) 
A)  9.0 × 105 Pa (9 atm) 
B)  2.5 × 106 Pa (25 atm) 
C)  4.5 × 106 Pa (45 atm) 
D)  9.0 × 106 Pa (90 atm)

Question 12

A cube of wood of density 0.78 g/cm3 is 11 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm3)

Accepted Answer

A)  8.6 cm 
B)  11 cm 
C)  2.4 cm 
D)  3.4 cm 
E)  ​1.4 cm 
A)  8.6 cm 
B)  11 cm 
C)  2.4 cm 
D)  3.4 cm 
E)  ​1.4 cm

Question 13

The bulk modulus of a material,as a meaningful physical property,is applicable to which of the following?

Accepted Answer

A)  only solids 
B)  only liquids 
C)  only gases 
D)  solids,liquids and gases 
A)  only solids 
B)  only liquids 
C)  only gases 
D)  solids,liquids and gases

Question 14

A ping-pong ball has an average density of 0.0840 g/cm3 and a diameter of 3.80 cm.What force would be required to keep the ball completely submerged under water?

Accepted Answer

A)  1.000 N 
B)  0.788 N 
C)  0.516 N 
D)  0.258 N 
A)  1.000 N 
B)  0.788 N 
C)  0.516 N 
D)  0.258 N

Question 15

A container is filled with water and the pressure at the container bottom is P.If the container is instead filled with oil having specific gravity 0.80,what new bottom pressure results?

Accepted Answer

A)  a pressure  P 
D)  This is unable to be determined with the information given. 
A)  a pressure  P 
D)  This is unable to be determined with the information given.

Question 16

A fluid has a density of 1 040 kg/m3.If it rises to a height of 1.6 cm in a 1.5-mm diameter capillary tube,what is the surface tension of the liquid? Assume a contact angle of zero.

Accepted Answer

A)  0.061 N/m 
B)  0.122 N/m 
C)  6.115 N/m 
D)  0.245 N/m 
E)  ​12.23 N/m 
A)  0.061 N/m 
B)  0.122 N/m 
C)  6.115 N/m 
D)  0.245 N/m 
E)  ​12.23 N/m

Question 17

Water (density = 1 × 103 kg/m3)flows at 11 m/s through a pipe with radius 0.025 m.The pipe goes up to the second floor of the building,2.5 m higher,and the pressure remains unchanged.What is the radius of the pipe on the second floor?

Accepted Answer

A)  0.01 m 
B)  0.028 m 
C)  0.001 m 
D)  0.18 m 
E)  ​0.023 m 
A)  0.01 m 
B)  0.028 m 
C)  0.001 m 
D)  0.18 m 
E)  ​0.023 m

Question 18

A container is filled with water and the pressure at the bottom of the container is P.Then the container is emptied halfway and topped off with oil of density 0.8 × 103 kg/m3,which floats on top of the water.What is the pressure at the bottom of the container now?

Accepted Answer

A)  a pressure  P 
D)  This is unable to be determined with the information given. 
E)  ​a pressure < 0.5P 
A)  a pressure  P 
D)  This is unable to be determined with the information given. 
E)  ​a pressure < 0.5P

Question 19

A pipe of diameter four cm is replaced by one of the same length but of diameter twelve cm.If the pressure difference between the ends of the pipe remains the same,by what factor is the rate of flow of a viscous liquid through it changed?
​

Accepted Answer

A)  3 
B)  9 
C)  27 
D)  81 
E)  ​243 
A)  3 
B)  9 
C)  27 
D)  81 
E)  ​243

Question 20

Spherical particles of density 1.6 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N⋅s/m3).The water is 10.0 cm deep and is allowed to stand for 35 minutes.What is the radius of the largest particles still in suspension at that time?
​

Accepted Answer

A)  6 × 10−6 m 
B)  7.3 × 10−6 m 
C)  2.8 × 10−6 m 
D)  2 × 10−6 m 
E)  ​4.7 × 10−6 m 
A)  6 × 10−6 m 
B)  7.3 × 10−6 m 
C)  2.8 × 10−6 m 
D)  2 × 10−6 m 
E)  ​4.7 × 10−6 m

Exam 9: Solids and Fluids

If the column of mercury in a barometer stands at 73.8 cm,what is the atmospheric pressure? (The density of mercury is 13.6 × 103 kg/m3 and g = 9.80 m/s2)

How much power is theoretically available from a mass flow of 1 200 kg/s of water that falls a vertical distance of 110 m?

A large stone is resting on the bottom of the swimming pool.The normal force of the bottom of the pool on the stone is equal to the:

How large a force is necessary to stretch a 1-mm-diameter steel wire (Y = 2.0 × 1011 N/m2)by 8.0%?

A solid object is made of two materials,one material having density of 2 000 kg/m3 and the other having density of 5 000 kg/m3.If the object contains equal volumes of the materials,what is its average density?

In a large tank of liquid,the hydrostatic pressure at a given depth is a function of:

An ideal fluid,of density 0.85 × 103 kg/m3,flows at 0.28 kg/s through a pipe of radius 0.017 m.What is the fluid speed?

When water freezes,it expands about nine percent.What would be the pressure increase inside your automobile engine block if the water in there froze? (The bulk modulus of ice is 2.0 × 109 Pa,and 1 atm = 1.0 × 105 Pa. )

Spherical particles of density 2.0 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N⋅s/m3).The water is 7.0 cm deep and is allowed to stand for 30 minutes.What is the greatest terminal velocity of the particles still in suspension at that time? ​

Water (density = 1 × 103 kg/m3)flows at 15 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building,3.0 m higher,and the pressure remains unchanged.What is the speed of the water flow in the pipe on the second floor?

The Greenland ice sheet can be one km thick.Estimate the pressure underneath the ice.(The density of ice is 918 kg/m3. )

A cube of wood of density 0.78 g/cm3 is 11 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm3)

The bulk modulus of a material,as a meaningful physical property,is applicable to which of the following?

A ping-pong ball has an average density of 0.0840 g/cm3 and a diameter of 3.80 cm.What force would be required to keep the ball completely submerged under water?

A container is filled with water and the pressure at the container bottom is P.If the container is instead filled with oil having specific gravity 0.80,what new bottom pressure results?

A fluid has a density of 1 040 kg/m3.If it rises to a height of 1.6 cm in a 1.5-mm diameter capillary tube,what is the surface tension of the liquid? Assume a contact angle of zero.

Water (density = 1 × 103 kg/m3)flows at 11 m/s through a pipe with radius 0.025 m.The pipe goes up to the second floor of the building,2.5 m higher,and the pressure remains unchanged.What is the radius of the pipe on the second floor?

A container is filled with water and the pressure at the bottom of the container is P.Then the container is emptied halfway and topped off with oil of density 0.8 × 103 kg/m3,which floats on top of the water.What is the pressure at the bottom of the container now?

A pipe of diameter four cm is replaced by one of the same length but of diameter twelve cm.If the pressure difference between the ends of the pipe remains the same,by what factor is the rate of flow of a viscous liquid through it changed? ​

Spherical particles of density 1.6 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N⋅s/m3).The water is 10.0 cm deep and is allowed to stand for 35 minutes.What is the radius of the largest particles still in suspension at that time? ​

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

If the column of mercury in a barometer stands at 73.8 cm,what is the atmospheric pressure? (The density of mercury is 13.6 × 10³ kg/m³ and g = 9.80 m/s²)

How large a force is necessary to stretch a 1-mm-diameter steel wire (Y = 2.0 × 10¹¹ N/m²)by 8.0%?

A solid object is made of two materials,one material having density of 2 000 kg/m³ and the other having density of 5 000 kg/m³.If the object contains equal volumes of the materials,what is its average density?

An ideal fluid,of density 0.85 × 10³ kg/m³,flows at 0.28 kg/s through a pipe of radius 0.017 m.What is the fluid speed?

When water freezes,it expands about nine percent.What would be the pressure increase inside your automobile engine block if the water in there froze? (The bulk modulus of ice is 2.0 × 10⁹ Pa,and 1 atm = 1.0 × 10⁵ Pa. )

Spherical particles of density 2.0 g/cm³ are shaken in a container of water (viscosity = 1.0 × 10−³ N⋅s/m³).The water is 7.0 cm deep and is allowed to stand for 30 minutes.What is the greatest terminal velocity of the particles still in suspension at that time?

Water (density = 1 × 10³ kg/m³)flows at 15 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building,3.0 m higher,and the pressure remains unchanged.What is the speed of the water flow in the pipe on the second floor?

The Greenland ice sheet can be one km thick.Estimate the pressure underneath the ice.(The density of ice is 918 kg/m³. )

A cube of wood of density 0.78 g/cm³ is 11 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm³)

A ping-pong ball has an average density of 0.0840 g/cm³ and a diameter of 3.80 cm.What force would be required to keep the ball completely submerged under water?

A fluid has a density of 1 040 kg/m³.If it rises to a height of 1.6 cm in a 1.5-mm diameter capillary tube,what is the surface tension of the liquid? Assume a contact angle of zero.

Water (density = 1 × 10³ kg/m³)flows at 11 m/s through a pipe with radius 0.025 m.The pipe goes up to the second floor of the building,2.5 m higher,and the pressure remains unchanged.What is the radius of the pipe on the second floor?

A container is filled with water and the pressure at the bottom of the container is P.Then the container is emptied halfway and topped off with oil of density 0.8 × 10³ kg/m³,which floats on top of the water.What is the pressure at the bottom of the container now?

A pipe of diameter four cm is replaced by one of the same length but of diameter twelve cm.If the pressure difference between the ends of the pipe remains the same,by what factor is the rate of flow of a viscous liquid through it changed?

Spherical particles of density 1.6 g/cm³ are shaken in a container of water (viscosity = 1.0 × 10−³ N⋅s/m³).The water is 10.0 cm deep and is allowed to stand for 35 minutes.What is the radius of the largest particles still in suspension at that time?