Question 1

A 15 000-N car on a hydraulic lift rests on a cylinder with a piston of radius 0.20 m.If a connecting cylinder with a piston of 0.040-m radius is driven by compressed air, what force must be applied to this smaller piston in order to lift the car?

Accepted Answer

A)  600 N
B)  1 500 N
C)  3 000 N
D)  15 000 NE) All of the above
F) C) and D)

Question 2

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 
B)  the same pressure P
C)  a pressure > P
D)  This is unable to be determined with the information given.E) B) and D)
F) None of the above

Question 3

A solid rock, suspended in air by a spring scale, has a measured mass of 9.00 kg.When the rock is submerged in water, the scale reads 3.30 kg.What is the density of the rock? (water density = 1 000 kg/m3)

Accepted Answer

A)  4.55 * 103 kg/m3
B)  3.50 * 103 kg/m3
C)  1.20 * 103 kg/m3
D)  1.58 * 103 kg/m3E) A) and D)
F) A) and C)

Question 4

A blimp is filled with 400 m3 of helium.How big a payload can the balloon lift? (The density of air is 1.29 kg/m3; the density of helium is 0.18 kg/m3.)

Accepted Answer

A)  111 kg
B)  129 kg
C)  215 kg
D)  444 kgE) A) and C)
F) B) and C)

Question 5

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)  14 m/s
C)  15 m/s
D)  16 m/sE) A) and B)
F) A) and C)

Question 6

A piece of aluminum has density 2.70 g/cm3 and mass 775 g.The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm3) .How much oil does the metal displace?

Accepted Answer

A)  287 cm3
B)  309 cm3
C)  232 cm3
D)  1 125 cm3E) A) and B)
F) C) and D)

Question 7

A unit for viscosity, the centipoise, is equal to which of the following?

Accepted Answer

A)  10-3 N*s/m2
B)  10-2 N*s/m2
C)  10-1 N*s/m2
D)  102 N*s/m2E) C) and D)
F) B) and D)

Question 8

A pipe carrying water has a radius of 1.0 cm.If the flow velocity is 9.0 cm/s, which of the following characterizes the flow? Take the viscosity of water to be 1.0 * 10-3 N*s/m.

Accepted Answer

A)  streamlined
B)  unstable
C)  turbulent
D)  stagnantE) C) and D)
F) B) and C)

Question 9

The bottom of a flat-bottomed aluminum boat has area = 4.0 m2 and mass = 60 kg.If two fishermen and their fishing gear with total mass of 300 kg are placed in the boat, how much lower will the boat ride in the water? (H2O density = 1.0 * 103 kg/m3)

Accepted Answer

A)  0.15 m
B)  0.090 m
C)  0.075 m
D)  0.060 mE) None of the above
F) C) and D)

Question 10

A stonecutter's chisel has an edge area of 0.50 cm2.If the chisel is struck with a force of 45 N, what is the pressure exerted on the stone?

Accepted Answer

A)  9 000 Pa
B)  90 000 Pa
C)  450 000 Pa
D)  900 000 PaE) A) and C)
F) None of the above

Question 11

The flow rate of a liquid through a 2.0-cm-radius pipe is 0.008 0 m3/s.The average fluid speed in the pipe is:

Accepted Answer

A)  0.64 m/s.
B)  2.0 m/s.
C)  0.040 m/s.
D)  6.4 m/s.E) A) and B)
F) A) and C)

Question 12

Which state of matter is associated with the very highest of temperatures?

Accepted Answer

A)  liquid
B)  plasma
C)  gas
D)  solidE) A) and D)
F) All of the above

Question 13

Water (density = 1 * 103 kg/m3)  flows at 10 m/s through a pipe with radius 0.030 m.The pipe goes up to the second floor of the building, 2.0 m higher, and the pressure remains unchanged.What is the radius of the pipe on the second floor?

Accepted Answer

A)  0.046 m
B)  0.034 m
C)  0.015 m
D)  0.012 mE) B) and C)
F) All of the above

Question 14

It takes 2.0 minutes to fill a gas tank with 40 liters of gasoline.If the pump nozzle is 1.0 cm in radius, what is the average speed of the gasoline as it leaves the nozzle? (1 000 liters = one cubic meter)

Accepted Answer

A)  0.27 m/s
B)  1.1 m/s
C)  11 m/s
D)  64 m/sE) A) and D)
F) B) and C)

Question 15

The pressure inside a commercial airliner is maintained at 1.00 atm (105 Pa) .What is the net outward force exerted on a 1.0 m * 2.0 m cabin door if the outside pressure is 0.30 atm?

Accepted Answer

A)  140 N
B)  1 400 N
C)  14 000 N
D)  140 000 NE) A) and C)
F) B) and C)

Question 16

A tire stops a car by use of friction.What modulus should we use to calculate the stress and strain on the tire?

Accepted Answer

A)  Young's modulus
B)  compression modulus
C)  shear modulus
D)  bulk modulusE) All of the above
F) B) and D)

Question 17

Bar One has a Young's modulus that is bigger than that of Bar Two.This indicates Bar One:

Accepted Answer

A)  is longer than Bar Two.
B)  has a greater cross-sectional area than Bar Two.
C)  has a greater elastic limit than Bar Two.
D)  is made of material that is different from Bar Two.E) All of the above
F) C) and D)

Question 18

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 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time?

Accepted Answer

A)  4.5 * 10-6 m
B)  9.0 * 10-6 m
C)  2.3 * 10-6 m
D)  5.6 * 10-6 mE) A) and B)
F) B) and C)

Question 19

A heavily loaded boat is floating in a pond.The boat starts to sink because of a leak but quick action plugging the leak stops the boat from going under although it is now deeper in the water.What happens to the surface level of the pond?

Accepted Answer

A)  It stays the same.
B)  It goes up.
C)  It goes down.
D)  More information is needed to reach a conclusion.E) A) and B)
F) B) and D)

Question 20

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 atmE) A) and D)
F) None of the above

Exam 9: Solids and Fluids

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?

Correct AnswerverifiedShow Answer

A solid rock, suspended in air by a spring scale, has a measured mass of 9.00 kg.When the rock is submerged in water, the scale reads 3.30 kg.What is the density of the rock? (water density = 1 000 kg/m3)

Correct AnswerverifiedShow Answer

Which state of matter is associated with the very highest of temperatures?

Correct AnswerverifiedShow Answer

A piece of aluminum has density 2.70 g/cm3 and mass 775 g.The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm3) .How much oil does the metal displace?

Correct AnswerverifiedShow Answer

Bar One has a Young's modulus that is bigger than that of Bar Two.This indicates Bar One:

Correct AnswerverifiedShow Answer

A blimp is filled with 400 m3 of helium.How big a payload can the balloon lift? (The density of air is 1.29 kg/m3; the density of helium is 0.18 kg/m3.)

Correct AnswerverifiedShow Answer

The pressure inside a commercial airliner is maintained at 1.00 atm (105 Pa) .What is the net outward force exerted on a 1.0 m * 2.0 m cabin door if the outside pressure is 0.30 atm?

Correct AnswerverifiedShow Answer

A heavily loaded boat is floating in a pond.The boat starts to sink because of a leak but quick action plugging the leak stops the boat from going under although it is now deeper in the water.What happens to the surface level of the pond?

Correct AnswerverifiedShow Answer

A tire stops a car by use of friction.What modulus should we use to calculate the stress and strain on the tire?

Correct AnswerverifiedShow Answer

The flow rate of a liquid through a 2.0-cm-radius pipe is 0.008 0 m3/s.The average fluid speed in the pipe is:

Correct AnswerverifiedShow Answer

A pipe carrying water has a radius of 1.0 cm.If the flow velocity is 9.0 cm/s, which of the following characterizes the flow? Take the viscosity of water to be 1.0 * 10-3 N*s/m.

Correct AnswerverifiedShow Answer

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 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time?

Correct AnswerverifiedShow Answer

Water (density = 1 * 103 kg/m3) flows at 10 m/s through a pipe with radius 0.030 m.The pipe goes up to the second floor of the building, 2.0 m higher, and the pressure remains unchanged.What is the radius of the pipe on the second floor?

Correct AnswerverifiedShow Answer

A unit for viscosity, the centipoise, is equal to which of the following?

Correct AnswerverifiedShow Answer

A stonecutter's chisel has an edge area of 0.50 cm2.If the chisel is struck with a force of 45 N, what is the pressure exerted on the stone?

Correct AnswerverifiedShow Answer

A 15 000-N car on a hydraulic lift rests on a cylinder with a piston of radius 0.20 m.If a connecting cylinder with a piston of 0.040-m radius is driven by compressed air, what force must be applied to this smaller piston in order to lift the car?

Correct AnswerverifiedShow Answer

It takes 2.0 minutes to fill a gas tank with 40 liters of gasoline.If the pump nozzle is 1.0 cm in radius, what is the average speed of the gasoline as it leaves the nozzle? (1 000 liters = one cubic meter)

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

The bottom of a flat-bottomed aluminum boat has area = 4.0 m2 and mass = 60 kg.If two fishermen and their fishing gear with total mass of 300 kg are placed in the boat, how much lower will the boat ride in the water? (H2O density = 1.0 * 103 kg/m3)

Correct AnswerverifiedShow Answer

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.)

Correct AnswerverifiedShow Answer

Correct Answer
verified

A solid rock, suspended in air by a spring scale, has a measured mass of 9.00 kg.When the rock is submerged in water, the scale reads 3.30 kg.What is the density of the rock? (water density = 1 000 kg/m³)

Correct Answer
verified

Correct Answer
verified

A piece of aluminum has density 2.70 g/cm³ and mass 775 g.The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm³) .How much oil does the metal displace?

Correct Answer
verified

Correct Answer
verified

A blimp is filled with 400 m³ of helium.How big a payload can the balloon lift? (The density of air is 1.29 kg/m³; the density of helium is 0.18 kg/m³.)

Correct Answer
verified

The pressure inside a commercial airliner is maintained at 1.00 atm (10⁵ Pa) .What is the net outward force exerted on a 1.0 m * 2.0 m cabin door if the outside pressure is 0.30 atm?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The flow rate of a liquid through a 2.0-cm-radius pipe is 0.008 0 m³/s.The average fluid speed in the pipe is:

Correct Answer
verified

A pipe carrying water has a radius of 1.0 cm.If the flow velocity is 9.0 cm/s, which of the following characterizes the flow? Take the viscosity of water to be 1.0 * 10^-3 N*s/m.

Correct Answer
verified

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 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time?

Correct Answer
verified

Water (density = 1 * 10³ kg/m³) flows at 10 m/s through a pipe with radius 0.030 m.The pipe goes up to the second floor of the building, 2.0 m higher, and the pressure remains unchanged.What is the radius of the pipe on the second floor?

Correct Answer
verified

Correct Answer
verified

A stonecutter's chisel has an edge area of 0.50 cm².If the chisel is struck with a force of 45 N, what is the pressure exerted on the stone?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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?

Correct Answer
verified

The bottom of a flat-bottomed aluminum boat has area = 4.0 m² and mass = 60 kg.If two fishermen and their fishing gear with total mass of 300 kg are placed in the boat, how much lower will the boat ride in the water? (H₂O density = 1.0 * 10³ kg/m³)

Correct Answer
verified

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.)

Correct Answer
verified