Question 1

A freight car rolls along a horizontal track at 12 m/s and hooks onto an identical freight car at rest. The coupled cars will

Accepted Answer

A) come to a quick stop, 
B) roll at 3 m/s, 
C) roll at 6 mph, 
D) roll at 12 ms,
Which makes sense because 
E) in the absence of external forces, trains in motion continue in motion.
F)the acceleration of the car at rest equals the force of impact divided by the two masses.
G)since twice the mass is moving, the speed will be half for the same momentum.
H)energies before and after the collision remain the same. 
A) come to a quick stop, 
B) roll at 3 m/s, 
C) roll at 6 mph, 
D) roll at 12 ms,
Which makes sense because 
E) in the absence of external forces, trains in motion continue in motion.
F)the acceleration of the car at rest equals the force of impact divided by the two masses.
G)since twice the mass is moving, the speed will be half for the same momentum.
H)energies before and after the collision remain the same.

Question 2

When air rapidly expands, its temperature will

Accepted Answer

A) decrease, 
B) increase, 
C) stay the same,
Whereas when air is rapidly compressed, its temperature will 
D) decrease. 
E) increase.
F)stay the same. 
A) decrease, 
B) increase, 
C) stay the same,
Whereas when air is rapidly compressed, its temperature will 
D) decrease. 
E) increase.
F)stay the same.

Question 3

Which of the following expands most when temperature is increased?

Accepted Answer

A) iron 
B) ice water 
C) helium 
D) all expand the same
Which of the following expands most when temperature is decreased? 
E) iron.
F)ice water.
G)helium.
H)all expand the same. 
A) iron 
B) ice water 
C) helium 
D) all expand the same
Which of the following expands most when temperature is decreased? 
E) iron.
F)ice water.
G)helium.
H)all expand the same.

Question 4

When water freezes, the surrounding air is

Accepted Answer

A) cooled, 
B) warmed, 
C) unchanged,
And when ice melts, the surrounding air is 
D) cooled. 
E) warmed.
F)unchanged. 
A) cooled, 
B) warmed, 
C) unchanged,
And when ice melts, the surrounding air is 
D) cooled. 
E) warmed.
F)unchanged.

Question 5

Which of these following statements about atoms is valid?

Accepted Answer

A) The atom is the smallest particle that exists. 
B) There are thousands of kinds of atoms, accounting for the great variety of substances. 
C) There are nearly 100 different kinds of atoms found in nature. 
D) Atoms are small building blocks of nature, being so small they cannot be photographed.
The word molecule can be at least partly identified by the following statement: 
E) The molecule is the smallest particle that exists.
F)The molecule is the smallest subdivision of matter that still retains the chemical properties of the substance from which it originates.
G)Combinations of molecules form atoms.
H)The chemical elements consist of 105 different molecules, a list that keeps growing. 
A) The atom is the smallest particle that exists. 
B) There are thousands of kinds of atoms, accounting for the great variety of substances. 
C) There are nearly 100 different kinds of atoms found in nature. 
D) Atoms are small building blocks of nature, being so small they cannot be photographed.
The word molecule can be at least partly identified by the following statement: 
E) The molecule is the smallest particle that exists.
F)The molecule is the smallest subdivision of matter that still retains the chemical properties of the substance from which it originates.
G)Combinations of molecules form atoms.
H)The chemical elements consist of 105 different molecules, a list that keeps growing.

Question 6

A 400-N person stands on the surface of Earth. If he were somehow able to stand on a ladder so that he was twice as far from the center of Earth, he would weigh

Accepted Answer

A) 0 N. 
B) 100 N. 
C) 200 N. 
D) 400 N.
This would be because 
E) he would be above the atmosphere.
F)his mass would be the same wherever he was.
G)the force due to gravity obeys the inverse square law. 
A) 0 N. 
B) 100 N. 
C) 200 N. 
D) 400 N.
This would be because 
E) he would be above the atmosphere.
F)his mass would be the same wherever he was.
G)the force due to gravity obeys the inverse square law.

Question 7

The aircraft that generates a shock wave will fly at

Accepted Answer

A) half the speed of sound. 
B) exactly the speed of sound. 
C) twice the speed of sound. 
D) all of these.
A sonic boom is produced by a missile traveling 
E) near the speed of sound.
F)at the speed of sound.
G)only above the speed of sound.
H)near, at, or above the speed of sound. 
A) half the speed of sound. 
B) exactly the speed of sound. 
C) twice the speed of sound. 
D) all of these.
A sonic boom is produced by a missile traveling 
E) near the speed of sound.
F)at the speed of sound.
G)only above the speed of sound.
H)near, at, or above the speed of sound.

Question 8

In the process of evaporation

Accepted Answer

A) heavier atoms are most prone to leave the liquid, 
B) there is a net gain in the number of atoms in the liquid, 
C) energy is absorbed by the liquid, 
D) all of these, 
E) none of these,
And the average rate of molecular motion for the atoms remaining in the liquid
F)increases.
G)decreases.
H)remains unchanged. 
A) heavier atoms are most prone to leave the liquid, 
B) there is a net gain in the number of atoms in the liquid, 
C) energy is absorbed by the liquid, 
D) all of these, 
E) none of these,
And the average rate of molecular motion for the atoms remaining in the liquid
F)increases.
G)decreases.
H)remains unchanged.

Question 9

If all potatoes are selling at the same price per kilogram, a housewife who plans to peel the potatoes would get more potato for her money if she bought

Accepted Answer

A) small potatoes. 
B) medium potatoes. 
C) large potatoes. 
D) no difference.
This is because she 
E) would get more potatoes per kilogram.
F)would get less potatoes per kilogram.
G)would get less peelings because of less surface area per pound.
H)buys weight, so any size per kilogram gives the same mass of potatoes. 
A) small potatoes. 
B) medium potatoes. 
C) large potatoes. 
D) no difference.
This is because she 
E) would get more potatoes per kilogram.
F)would get less potatoes per kilogram.
G)would get less peelings because of less surface area per pound.
H)buys weight, so any size per kilogram gives the same mass of potatoes.

Question 10

The density of an average person is about

Accepted Answer

A) 480 kg/m3 (30 lb/ft3). 
B) 960 kg/m3 (60 lb/ft3). 
C) 1920 kg/m3 (120 lb/ft3). 
D) 2400 kg/m3 (150 lb/ft3).
From this we can see that the volume of a 120-lb person is about 
E) 1 ft3.
F)2 ft3.
G)3 ft3.
H)4 ft3.
I)not enough information to estimate. 
A) 480 kg/m3 (30 lb/ft3). 
B) 960 kg/m3 (60 lb/ft3). 
C) 1920 kg/m3 (120 lb/ft3). 
D) 2400 kg/m3 (150 lb/ft3).
From this we can see that the volume of a 120-lb person is about 
E) 1 ft3.
F)2 ft3.
G)3 ft3.
H)4 ft3.
I)not enough information to estimate.

Question 11

When gas in a container is squeezed to half its volume, its density is

Accepted Answer

A) halved, 
B) unchanged, 
C) doubled, 
D) quadrupled,
And neglecting any temperature changes we would find the gas pressure to be 
E) halved.
F)unchanged.
G)doubled.
H)quadrupled. 
A) halved, 
B) unchanged, 
C) doubled, 
D) quadrupled,
And neglecting any temperature changes we would find the gas pressure to be 
E) halved.
F)unchanged.
G)doubled.
H)quadrupled.

Question 12

A 2-m-tall person viewing his full-length image in a plane mirror requires a mirror that is at least

Accepted Answer

A) any visible size. 
B) 2 m tall. 
C) 1 m tall.
The size of mirror required 
D) depends on how far away from it he stands. 
E) does not depend on how far away from it he stands. 
A) any visible size. 
B) 2 m tall. 
C) 1 m tall.
The size of mirror required 
D) depends on how far away from it he stands. 
E) does not depend on how far away from it he stands.

Question 13

When an ice cube in a glass of water melts, the water level will

Accepted Answer

A) rise 
B) fall 
C) remain the same
If the ice cube contains many air bubbles, after melting the water level will 
D) rise. 
E) fall.
F)remain the same. 
A) rise 
B) fall 
C) remain the same
If the ice cube contains many air bubbles, after melting the water level will 
D) rise. 
E) fall.
F)remain the same.

Question 14

When water at 4°C is heated, it expands. When water at 4°C is cooled, it

Accepted Answer

A) contracts, 
B) expands, 
C) neither contracts nor expands, 
D) not enough information given,
Which follows from the fact that 
E) cooling decreases the kinetic energy of H2O molecules.
F)water has its greatest density at 4°C.
G)we do not know how the water is cooled. 
A) contracts, 
B) expands, 
C) neither contracts nor expands, 
D) not enough information given,
Which follows from the fact that 
E) cooling decreases the kinetic energy of H2O molecules.
F)water has its greatest density at 4°C.
G)we do not know how the water is cooled.

Question 15

Figure H-1
  
-When an iron ring is heated, the hole becomes

Accepted Answer

A) smaller, 
B) larger, 
C) neither smaller nor larger,
Which follows from the fact that 
D) expansion takes place inward toward the center of the ring as well as outward. 
E) expansion takes place in all directions.
F)the surrounding air and the iron expand at different rates. 
A) smaller, 
B) larger, 
C) neither smaller nor larger,
Which follows from the fact that 
D) expansion takes place inward toward the center of the ring as well as outward. 
E) expansion takes place in all directions.
F)the surrounding air and the iron expand at different rates.

Question 16

Figure N-5
  
-The two men compete in a tug of war. Both pull equally and the scale reads 800 newtons. Each man must pull with a force of

Accepted Answer

A) 400 N. 
B) 800 N. 
C) 0 N.
Consider action and reaction forces in this case: If action is the man on the left pulling on the rope, then the reaction force is 
D) the rope pulling on the man on the left. 
E) the rope pulling on the man on the right.
F)the man on the right pulling on the rope. 
A) 400 N. 
B) 800 N. 
C) 0 N.
Consider action and reaction forces in this case: If action is the man on the left pulling on the rope, then the reaction force is 
D) the rope pulling on the man on the left. 
E) the rope pulling on the man on the right.
F)the man on the right pulling on the rope.

Question 17

Figure E/M-4
  
-Refer to the figure above. Assume the switch in the primary has been closed for a few minutes. Then there is a current in the

Accepted Answer

A) primary, but not the secondary. 
B) secondary, but not the primary. 
C) primary and secondary. 
D) neither the primary nor the secondary.
When the switch is opened suddenly, current in the primary 
E) decreases, while current builds up in the secondary.
F)increases, while current decreases in the secondary. 
A) primary, but not the secondary. 
B) secondary, but not the primary. 
C) primary and secondary. 
D) neither the primary nor the secondary.
When the switch is opened suddenly, current in the primary 
E) decreases, while current builds up in the secondary.
F)increases, while current decreases in the secondary.

Question 18

If a constant net force is applied to a body, the body is

Accepted Answer

A) accelerating. 
B) moving at constant speed. 
C) at rest or moving at constant velocity.
If a body is moving at constant velocity, it must have 
D) a constant net force acting upon it. 
E) constant non-zero acceleration.
F)constant speed.
G)none of the above. 
A) accelerating. 
B) moving at constant speed. 
C) at rest or moving at constant velocity.
If a body is moving at constant velocity, it must have 
D) a constant net force acting upon it. 
E) constant non-zero acceleration.
F)constant speed.
G)none of the above.

Question 19

The energy released by the Sun is the outcome of atomic nuclei

Accepted Answer

A) breaking apart, 
B) combining together,
And radioactive by-products are a chief result of atomic nuclei 
C) breaking apart. 
D) combining together. 
E) doing neither. 
A) breaking apart, 
B) combining together,
And radioactive by-products are a chief result of atomic nuclei 
C) breaking apart. 
D) combining together. 
E) doing neither.

Exam 37: Systems of Measurement

A freight car rolls along a horizontal track at 12 m/s and hooks onto an identical freight car at rest. The coupled cars will

When air rapidly expands, its temperature will

Which of the following expands most when temperature is increased?

When water freezes, the surrounding air is

Which of these following statements about atoms is valid?

A 400-N person stands on the surface of Earth. If he were somehow able to stand on a ladder so that he was twice as far from the center of Earth, he would weigh

The aircraft that generates a shock wave will fly at

In the process of evaporation

If all potatoes are selling at the same price per kilogram, a housewife who plans to peel the potatoes would get more potato for her money if she bought

The density of an average person is about

When gas in a container is squeezed to half its volume, its density is

A 2-m-tall person viewing his full-length image in a plane mirror requires a mirror that is at least

When an ice cube in a glass of water melts, the water level will

When water at 4°C is heated, it expands. When water at 4°C is cooled, it

Figure H-1 -When an iron ring is heated, the hole becomes

Figure N-5 -The two men compete in a tug of war. Both pull equally and the scale reads 800 newtons. Each man must pull with a force of

Figure E/M-4 -Refer to the figure above. Assume the switch in the primary has been closed for a few minutes. Then there is a current in the

If a constant net force is applied to a body, the body is

The energy released by the Sun is the outcome of atomic nuclei

About Science

Newtons First Law of Motion: Inertia

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Change of Phase

Thermodynamics

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Electromagnetic Induction

Properties of Light

Color

Reflection and Refraction

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