Physics

Front 1

The electromagentic waves having the highest speed in free spaces?

Back 1

None. Gamma, light, and radio waves all have the same speed.

Front 2

The smallest portion of the elctromagnetic spectrum is?

Back 2

visible light

Front 3

What are materials that clearly transmit visible light?

Back 3

transparent

Front 4

What are the principle differences between a radio wave and light? Between an x-ray?

Back 4

Radio waves have a lower frequency and longer wavelength than visible light. Light waves have lower frequency and longer wavelength than x-rays.

Front 5

If an atom is excited, what has it boosted?

Back 5

Electrons

Front 6

What is the energy of a photon directly proportional to?

Back 6

Frequency. Energy of photon = frequency.

Front 7

What is the energy level of an outer shell compared to the inner shells?

Back 7

The outer shells have a higher energy level.

Front 8

How does the energy of a photon relate to energy levels?

Back 8

The difference between energy levels is equal to the energy of the photon.

Front 9

Which has the higher frequency: red or blue light? Which has the great energy per photon: red or blue light?

Back 9

Blue light has a higher frequency than red.

Blue light has a greater energy per photon than red.

Front 10

Which puts out the greater percentage of its energy as visible light: an incandescent lamp or a mercury vapor lamp? How is the remaining non-visible light energy emitted?

Back 10

Mercury vapor lamp puts out a greater amount of energy as visible light.

Incandescent lamps emit more light in the infrared

Front 11

what is h in the equation, E=hf

Back 11

h is the proportionality constant

Front 12

what does a photon act as when traveling?

Back 12

a wave

Front 13

what compromises the least radiation in our everyday environment

Back 13

nuclear power plants

Front 14

Which of these ejects into the atmosphere the greatest amount of dangerous radiation?

Back 14

coal fired power plants

Front 15

If a certain isotope has a radioactive half-life or 10 yrs, how much of the isotope will remain at the end of 20 yrs?

Back 15

quarter life

Front 16

An element that undergoes radioactive decay becomes?

Back 16

An entirely different element

Front 17

Carbon 14 in the atmosphere is transformed from?

Back 17

Nitrogen

Front 18

All of the uranium in today’s deposits in the future will become?

Back 18

Lead

Front 19

What kind of force pushes particles in the atomic nucleus apart?

Back 19

Electric Force

Front 20

The energy released by nuclear fission is in accord with the celebrated equation?

Back 20

E=mc^2

Front 21

Which element cannot produce energy by fission of fusion?

Back 21

Iron

Front 22

Which body glows with electromagnetic waves?

Back 22

sun, earth, people

Front 23

Waves emitted by the sun and terrestrial wave emissions are?

Back 23

The same except for their frequencies and wavelengths

Front 24

The planet Earth loses heat primarily by?

Back 24

radiation

Front 25

Glass in a florist’s greenhouse acts as a one-way valve in that it?

Back 25

High frequency light comes in, and low frequency radiation is prevented from escaping

Front 26

If there were no greenhouse effect, Earth’s avg. temp would likely be?

Back 26

-18 degrees C

Front 27

Which is the most abundant greenhouse gas in the Earth’s atmosphere?

Back 27

Water Vapor

Front 28

Looking forward, common consensus will likely agree that the wisest use of fossil fuels is to?

Back 28

Save them for tomorrows materials

Front 29

when we can change the compositions of the atmosphere we likely also change?

Back 29

average temp, climate, reflectivity, transparency

Front 30

If the composition of the upper atmosphere were altered to permit a greater amount of terrestrial radiation to escape, earth would be?

Back 30

Cooler. Allowing more radiation to escape is going to cause cooling.

Front 31

Long ago a runaway greenhouse effect transformed the planet?

Back 31

Venus

Front 32

What are the 3 possible fates of neutrons in uranium metal?

Back 32

escape, fission of U-235, absorbed by U-238

Front 33

Which element typically undergoes a chain reaction?

Back 33

U-235

Front 34

Why doesn’t a chain reaction normally occur in uranium mines?

Back 34

only a small amount of natural uranium is able to fission U-235, so released neutrons do not trigger another fission

Front 35

Why is a chain reaction more likely to occur in a big piece of uranium than in a small piece?

Back 35

in a big piece, the neutrons are more likely to strike another nucleus before exiting the piece

Front 36

What is meant by the idea of a critical mass?

Back 36

a mass that is large enough that the nucleus will hit another nucleus before exiting the mass.

Front 37

What are the 4 main components of a fission reactor?

Back 37

fuel, rod, moderator, fluid

Front 38

What isotope is produced when U-238 absorbs a neutron?

Back 38

U-239

Front 39

In what way is a nuclear reactor similar to a conventional fossil-fuel plant?

Back 39

They both boil water to make steam

Front 40

Which ions of like charge and equal speed are least deflected in a mass spectrometer?

Back 40

the more massive ions

Front 41

In which element is the mass per nucleon greatest? Least?

Back 41

Hydrogen is the greatest mass per nucleon, iron is the least mass per nucleon.

Front 42

what is the range of visible light

Back 42

380-770 nm

Front 43

T/F longer wavelengths reach smaller frequencies

Back 43

true

Front 44

why is the period of osciliation larger for longer wavelengths

Back 44

the period of oscilation is longer for longer WL because the speed of light is constant.

Front 45

What is the visbility of UV light (300 nm)

Back 45

invisible

Front 46

what range is a photon with 1 nm in?

Back 46

x-ray/gamma ray range

Front 47

what range is a photon with 1000 nm or 1 micrometer

Back 47

infrared

Front 48

what range is a photon with 1 million nm or 1 mm

Back 48

microwave

Front 49

at 300 kelvin, what does earths surface emit

Back 49

infrared

Front 50

how does little water and no CO2 impact infrared

Back 50

makes it less

Front 51

IR photos may be absorbed by CO2, which then warms up what molecules

Back 51

N2

Front 52

a nucleus with 10 amu and a nucleus with 12 amu form exactly 22 amu, E=MC^2 is generated in the process. T/F?

Back 52

false

Front 53

T/F: the ozone layer is at about 1.6 km height

Back 53

false

Front 54

T/F: ozone is made of 3 oxygen atoms

Back 54

truuuuu

Front 55

T/F: ozone is never found at ground level

Back 55

tru

Front 56

T/F: ozone is a stable molecule that blocks UV and never breaks, if not for CFCs.

Back 56

false

Front 57

T/F: ozone molecules are bokren if a catalyst like chlorine is interacting with them

Back 57

tru

Front 58

alpha, beta, omicron are types of radiations, T/F:

Back 58

false

Front 59

T/F: gamma radiation is made of protons, light particles

Back 59

tru

Front 60

T/F: Beta radiation may turn a proton into a neutron

Back 60

tru

Front 61

T/F: iron nuclei may merge w/ krypton to form U-235 in the process fo creating a huge blast

Back 61

false

Front 62

T/F: atomic bombs were made from a few kg of uranium

Back 62

tru

Front 63

T/F: fission is the process of splitting heavy nuclei into smaller pieces, as long as energy is produced

Back 63

tru

Front 64

T/F: if the products of a split nuclei as less than the original mass, it becomes energy

Back 64

false af

Front 65

T/F: the merging of two small nuceli may result in energy producting

Back 65

tru

Front 66

T/F: the merging of small nuceli to produce larger masses was a process used for H bombs

Back 66

true

Front 67

fusion reactors are the largest productors of energy in the world

Back 67

false

Front 68

T/F: the power of an explosive device is in watts

Back 68

tru

Front 69

In small nuclear device is made3 of gasoline bomb and lead it will (made of 1 kg?)

Back 69

will not have a nuclear explosion

Front 70

If you only use oil for energy we will solve the world’s economic problems by 2018. T/F:

Back 70

false

Front 71

The reason we haven’t built fusion nuclear so far is?

Back 71

we do not know how to create controlled fusion, uncontrolled fusion leads to H bombs.

Front 72

When interference of waves happens on the screen we see dark and bright stripes. When one photon at a time hits the screen we see?

Back 72

dark and bright stripes

Front 73

Wave’s interference is when a wave crest and another crest form a bigger crest “bright spots”, and crests and troughs?

Back 73

they cancel each other out

Front 74

A “potential well” represents a molecule. More “loops” represent?

Back 74

a higher energy level

Front 75

The reason uranium fission releases energy is that?

Back 75

the 92 protons in U hate each other

Front 76

How many calories are needed per day? For a submarine??

Back 76

2 billion kcal

Front 77

Marie and Pierre Curie’s hypothesis was that the rays that developed the film near Becquerel’s uranium were?

Back 77

a new kind of radiation

Front 78

Maries and Pierre Curie proved that uranium was producing high energy radiation by?

Back 78

measuring small currents in ionized gas near U

Front 79

-What are the 3 types of radiation?

Back 79

alpha, beta, gamma

Front 80

what is the horizontal acceleration of a projectile?

Back 80

none, no force or a on a horizontal plane

Front 81

what is the acceleration of a baseball with no air resistance

Back 81

Downward 9.8m/s ^2

Front 82

When a satellite travels at a constant speed, the shape of its path is?

Back 82

circle

Front 83

NASA can’t load all observatories on one spaceship because?

Back 83

the weight would be too large

Front 84

There are some types of radiation that can’t be measured from Earth’s surface because?

Back 84

the radiation cannot penetrate earth's atmosphere

Front 85

Venus mission discovered that?

Back 85

high temp, flowing lava on the surface, sulfuric acid in higher altitude

Front 86

Many optical instruments such as lenses and mirrors were invented by?

Back 86

archimedes, sahl, alhazen

Front 87

The speed of light through stellar aberrations was found because?

Back 87

Bradley was trying to find the parallax of nearby stars

Front 88

Rainbows were explained by?

Back 88

Theodoric, Farisi, Descartes, young

Front 89

“Black Body” radiation peak can tell you what about the source?

Back 89

the temperature of the source

Front 90

kelvins to C

Back 90

273.15

Front 91

kelvins to F

Back 91

460

Front 92

If an electron vibrates up and down 1000 times each second, it generates and electromagnetic eave with a?

Back 92

the electron would emit a wave with 1000 Hz

Front 93

The electromagnetic spectrum spans waves ranging from lowest to highest frequencies. The smallest portion of the electromagnetic spectrum is that of?

Back 93

visible light

Front 94

Mixing red, green and blue light overlap to form?

Back 94

white light

Front 95

Which has less energy per photon?

Back 95

red

Front 96

Excitation is the process in which?

Back 96

electrons are boosted to higher energy levels in an atom

Front 97

Most of what we know about atoms is gained by investigating the?

Back 97

the light they emit. how lit they are.

Front 98

An atom that absorbs a photon can then emit one?

Back 98

only at the same or lower energy