Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PHY1020 > Exam 2 > Flashcards

Exam 2 Flashcards

1
Q

Recent reports discussing the population bomb…

A

Indicate that the explosion is slowing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A one-kiloton nuclear weapon, exploded at ground level, would destroy…

A

About 1 square kilometer of a city

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

For an atomic bomb, the number if doublings required is closest to…

A

80

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

An implosion type bind is required for…

A

A Pu-239 bomb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which of the following does not represent exponential growth?

A

illness from anthrax

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The statement that Chernobyl accident will kill 24,000 people is based on…

A

The linear hypothesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A moderator is something that…

A

Slows neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The dangerous radioactivity in fallout comes from…

A

Fission fragments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Fallout is much worse if the bomb…

A

Is exploded near the ground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A nuclear reactor cannot explode like a nuclear bomb because…

A

The nuclear reactor depends on slow neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

According to the text, the least bad place to put nuclear waste is…

A

Underground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

A breeder reactor is designed to produce…

A

Plutonium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The number of nuclear weapons that the United States had was closest to…

A

Ten thousand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

PCR has been used to (choose all that are appropriate)

A 
(ALL OF THEM)
A. Identify children of Thomas Jefferson 
B. Check the guilt of convicted murders
C. Identify the victims of 9/11
D. Identify the fathers of children
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The Hiroshima bomb used…

A

A gun design

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

If the water moderator is lost from a nuclear reactor…

A

The chain reaction will increase, causing a reactivity accident

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The material that might be “reprocessed” from nuclear waste is…

A

Pu-239

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which of the following is not a good example of the doubling law?

A

Future population growth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The Canadian Candu reactors use…

A

Deuterium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Plutonium can explode with fewer generation than can uranium because…

A

Plutonium fission releases more neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

In a nuclear power plant, the material that runs through the turbine is…

A

Stream

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

The number of deaths from the Nagasaki bomb is estimated to be…

A

50,000 to 150,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The smallest container that could contain one critical mass of plutonium is…

A

A coffee mug

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

The bomb dropped on Hiroshima used as its fuel…

A

Uranium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Saddam Hussein planned to enrich uranium using…

A

Calutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

A centrifuge enrichment plant takes an area of about…

A

One large classroom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

PCR involves…

A

DNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

One of the most dangerous radioactive materials from fallout is…

A

Sr-90

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

The term China syndrome refers to…

A

Meltdown of nuclear fuel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Depleted uranium is a useful substance because…

A

An artillery shell made from it is very penetrating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

PCR was used to learn about…

A

Descendants of Sally Hemmings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Another name for the H-Bomb is

A

Thermonuclear bomb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

A nuclear explosion similar to the one produced by North Korea would destroy an area of about….

A

The size of a college campus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Cold fusion…

A

Has been seen in laboratory experiments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

At Three Mile Island (choose all that are correct)

A

Some of the uranium fuel melted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What distinguishes a breeder reactor from other reactors is that…

A

It makes more fuel than it uses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Jupiter is not a star because…

A

It isn’t massive enough

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Current is measured by…

A

Amps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

A volt is measure of…

A

Energy per electron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Magnetism comes from…

A

Moving electric charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

In a permanent magnet, the magnetism comes from:

A

The spin of the electron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Magnetic monopoles…

A

Have never been found

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

Rail guns push the projectile using…

A

Magnetic fields

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Tesla wanted to use a transformer to distribute electricity because…

A

It deceased the current going through line wire to reduce the loss of electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

You can demagnetize a natural magnet…

A

By heating it above the Curie point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

What discovery now allows for headphones to be small and light?

A

Rare-earth magnets, such as samarium cobalt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Which of the following use or consist is permanent magnets? (choose all that apply)

A

Transformers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

Theoretically, the Earth should not have permanent magnet in its core because…

A

It’s interior is too hot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

The Earth’s magnetism comes from…

A

Iron in the crust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

The Earth flips its magnetism, on average, approximately…

A

Twice every million years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

The north geographic pole of the Earth…

A

Is a south magnetic pole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

Compasses point north because…

A

There are electric currents in the iron core of the earth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

Electricity will heat a wire if it has…

A

High current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Static electricity occurs when two surfaces rub against each other and…

A

Electrons flow from one to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

Europe uses higher voltage in homes because it…

A

Creates less heat in home wiring

56
Q

Lights and TVs in Europe tend to flicker because Europe uses…

A

50 hertz- the United States uses 60 Hertz

57
Q

When an object loses some electrons, it…

A

Has a positive charge

58
Q

To get a spark, you normally need:

A

High Voltage

59
Q

A fuse is used in a house to prevent…

A

House wires from overheating

60
Q

The Earth’s magnetic flips are used for…

A

Geologic dating

61
Q

In a metal, electrons…

A

Can move freely

62
Q

The aspect of electricity that would make it most dangerous is high…

A

Current

63
Q

A certain kind of generator uses its own electricity to strengthen its magnetic field. Such a generator is called a…

A

Dynamo

64
Q

The original superconductors were cooled with…

A

Liquid Helium

65
Q

Room-temperature superconductors…

A

Have no practical applications

66
Q

High-temperature superconductors operate at approximately:

A

-123 C (liquid nitrogen temperature)

67
Q

We use AC instead of DC because…

A

AC can use transformers

68
Q

Topsy was executed with AC…

A

To show the dangers of high voltage

69
Q

Edison wanted…

A

A power plant on every city block

70
Q

The current through a flashlight bulb is…

A

About one AMP

71
Q

A stereo speaker produces sound by the force…

A

Of a magnetic field on an electric charge

72
Q

The light from an ordinary light bulb comes from the fact that…

A

The wire is heated by electricity

73
Q

A Tesla coil is a kind of…

A

Transformer

74
Q

Submarines can be detected by their…

A

Magnetism

75
Q

At the Curie temperature…

A

Magnetism disappears

76
Q

Most electric power is generated by…

A

A wire moving through a magnetic field

77
Q

What invention made it possible to charge low voltage AC to high voltage AC?

A

Transformer

78
Q

To reduce losses from resistance, electric power lines use…

A

Very high voltage

79
Q

An example of a transformer is…

A

A Tesla coil

80
Q

Better motors and earphones have recently been made possible by…

A

Stronger magnets

81
Q

Beats measure…

A

The difference between two frequencies

82
Q

Waves tend to bend in to the side…

A

With slower wave velocity

83
Q

The fastest earthquake wave is…

A

P Wave

84
Q

The slowest earthquake wave is…

A

L Wave

85
Q

An octave refers to two frequencies that differ by a factor of…

A

2

86
Q

When two different waves pass through an opening of the same size, which one will spread more?

A

Larger Wavelength

87
Q

The fastest sound wave is:

A

They all travel at the same speed

88
Q

You can measure the distance to the epicenter by measuring…

A

The time between the P and S waves

89
Q

Sound travels faster in…

A

Rock

90
Q

When an opening gets smaller, a wave that passes through it…

A

Spreads more

91
Q

The very center of the earth is…

A

Solid iron

92
Q

Which kind of earthquake wave is purely longitudinal…

A

P Wave

93
Q

Which of the following statements about earthquakes is true?

A

P waves are fastest, and L waves cause the most destruction

94
Q

The L wave is often the most damaging because…

A

It stays on the surface, so it doesn’t spread out very much

95
Q

An earthquake wave does its most damage when it reaches an area that…

A

Slows it down

96
Q

Landfill is dangerous because…

A

The amplitude of the earthquake increases.

97
Q

When there is an atmospheric inversion, sound tends to…

A

Bend downward

98
Q

The ocean sound channel…

A

Is very quiet

99
Q

Sound tends to bend toward the side with…

A

Colder air

100
Q

The same note is played on two pianos. Beats are heard once per second. From this, we deduce that…

A

At least one of the pianos is out of tune

101
Q

We know that the inner part of the Earth is liquid because…

A

No S waves move across it

102
Q

A magnitude 9 earthquake, compared to a magnitude 8 earthquake…

A

Has 10 to 30 times more energy

103
Q

You feel the tremors of an earthquake. Ten seconds later, you feel another shaking. The distance to the epicenter is about…

A

50 miles

104
Q

If we double the frequency of sound, the wavelength is…

A

Halved

105
Q

Beats demonstrate that…

A

Sound is a wave

106
Q

The velocity of sound is approximately…

A

1000 feet per second

107
Q

The speed of sound in air…

A

Increases as temperature increases

108
Q

Sound waves are…

A

Compressional (longitudinal)

109
Q

On a typical day, sound emitted near the ground tends to bend…

A

Upward, toward the sky

110
Q

You are more likely to hear distant sound when…

A

The air near the ground is cool and the air above is also cool

111
Q

Because of evaporation, the air above the surface of a lake becomes cool. Sound in the air above the lake will tend to…

A

Bend downward towards the surface

112
Q

To have a sound channel, there must be…

A

A minimum in the velocity of sound

113
Q

SOFAR took advantage of…

A

The sound channel in the ocean

114
Q

Water waves are…

A

Both transverse and longitudinal

115
Q

The sound channel in the ocean carries sound a long distance because…

A

The sound doesn’t spread out in the up and down directions

116
Q

As you travel deeper into the ocean, the water temperature…

A

First gets cooler, than warmer

117
Q

A pianist plays two keys: middle C, and the C above middle C (i.e., an octave higher). The speed of sound for the higher frequency, compared to that for the lower frequency, is (careful, this may be a trick question)…

A

The same

118
Q

As you move to a higher altitude, the temperature of the air…

A

First gets cooler, then warmer

119
Q

The atmospheric sound channel would not exist, if not for…

A

ultraviolet light

120
Q

The ozone layer is created by…

A

Sunlight

121
Q

SOSUS refers to…

A

A system for detecting submarines

122
Q

Which of the following statements was true about Project Mogul?

A

It was concerned with the atmosphere

123
Q

According to this text, the flying disks that crashed near Roswell were…

A

Microphones

124
Q

Very long wavelengths water waves…

A

Travel faster than short ones

125
Q

Whales and fiber optics both make use of what principle…

A

Huygens

126
Q

When an earthquake at sea starts a tsunami or tidal wave, the initial height is relatively small. What accounts for the towering wave that breaks near the shore…

A

The wave moves slower

127
Q

A water wave has a wavelength of 10 meters and a frequency of 2 cycles/sec.

A

20 meters per second

128
Q

The sound from a passing car sounds like a high pitch, but as it passes, it gets lower. That’s an example of…

A

The Doppler shift

129
Q

Thunderclouds tend to rise until…

A

They reach air that is warmer than they are

130
Q

The atmospheric sound channel is created because of…

A

Ultraviolet light

131
Q

In the daytime, sound tends to…

A

Bend upward

132
Q

Most damage from an earthquake usually from the…

A

L wave

133
Q

For sound waves, low-frequency waves travel…

A

The same speed as the high frequency

134
Q

The piano note A above the middle C is 440 Hz. The next higher A has a frequency…

A

880

135
Q

Moore’s Law relates to…

A

Computer chip capability

PHY1020 (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions