Final

Question 1

The ratio of energy to frequency for a photon gives

Answer 1

Planck’s constant

Question 2

In the relativistic case, doubling the speed of an electron causes its wavelength to

Answer 2

decrease to less than one-half

Question 3

If the position of an electron is measured very precisely there is an uncertainty in measuring its

Answer 3

momentum

Question 4

The elements in the periodic table that have completely filled shells or subshells are referred to as

Answer 4

noble gases

Question 5

Ionic bonding is caused by

Answer 5

the transfer of electrons between atoms

Question 6

An unfilled electron state in the valence band is called

Answer 6

a hole

Question 7

In beta minus decay, the number of neutrons in the nucleus

Answer 7

is decreased by 1

Question 8

The fuel for nuclear fission

Answer 8

U

Question 9

If the Earth is located 10% nearer to the Sun than the real location, what is the total sunshine energy on the Earth?

Answer 9

about 20% more

Question 10

The Sun and planets formed about – years ago

Answer 10

5 billion

Question 11

What is the electric charge of d-quark?

Answer 11

-1/3

Question 12

What element (oxygen, iron, carbon, silver, silicon) was made only by the supernova explosion?

Answer 12

silver

Question 13

The dark matter is expected to be attracted by –

Answer 13

gravity

Question 14

The most stable element in the universe, one that is energetically unfavorable to both fission and fusion is

Answer 14

iron

Question 15

The temperature of the universe at 1 second after the Big Bang was about

Answer 15

10^10 K

Question 16

When light enters a material of higher index of refraction, its speed

Answer 16

decreases

Question 17

A light ray is reflected by two mirrors that are perpendicular. The new direction of the ray is – degrees from the original direction

Answer 17

180

Question 18

An object is placed in front of a convex mirror at a distance larger than twice the focal length of the mirror. The image will appear

Answer 18

upright and smaller

Question 19

The chromatic aberration in lenses is due to the – of light by the lens

Answer 19

dispersion

Question 20

A piece of wood is floating in a bathtub. A second piece of wood sits on tops of the first piece, and does not touch the water. If the top piece is taken off and placed in the water, what happens to the water level in the tub?

Answer 20

It does not change

Question 21

Bernoulli’s principle is a statement of the conservation of

Answer 21

energy

Question 22

When a bimetallic strip is heated, the strip will bend toward the side with the – coefficient of linear expansion

Answer 22

smaller

Question 23

When both the pressure and the absolute temperature of an ideal gas are increased each by a factor of two, the volume occupied by the gas will

Answer 23

not change

Question 24

A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules at STP have the same number of –

Answer 24

molecules

Question 25

A sample of an ideal gas is slowly compressed to 1/2 its original volume with no change in temperature. What happens to the average speed of the molecules in the sample?

Answer 25

it does not change

Question 26

The heat required to change a substance form the solid to the liquid state is referred to as the

Answer 26

heat of fusion

Question 27

The process whereby heat flows by means of molecular collisions is referred to as

Answer 27

conduction

Question 28

Relative to a stationary observer, a moving object appears -- than normal

Answer 28

shorter

Question 29

What property of the beam of light applies to a laser beam?

Answer 29

it is coherent

Question 30

The spreading of white light into its spectrum is called?

Answer 30

dispersion

Question 31

If a person's eyeball is too short rom front to back, the person is likely to suffer from

Answer 31

farsightedness

Question 32

Farsightedness can usually corrected with

Answer 32

converging lenses

Question 33

In a hydrogen atom, an electron is bound around a proton by --force

Answer 33

electromagnetic

Question 34

The time when the strong force is unified with electro-weak force

Answer 34

Grand Unification

Question 35

If the mirror diameter of the telescope becomes twice larger, the light-gathering power is

Answer 35

4 times better

Question 36

galaxies were formed as early as -- after the Big Bang

Answer 36

1 billion years after

Question 37

Increasing wavelengths: radio, ultra-violet, visible, x-ray

Answer 37

x-ray, ultra-violet, visible, radio

Question 38

What natural barrier tries to prevent two protons from combining?

Answer 38

electromagnetic repulsion

Question 39

Which particle is the heaviest?

Answer 39

neutron

Question 40

In today's Universe, compared to the number of photons, the number of electrons is

Answer 40

suppressed by more than a billion

Question 41

How many stars in our Universe?

Answer 41

10^22

Question 42

When atmospheric pressure increases, what happens to the absolute pressure at the bottom of a pool?

Answer 42

it increases by the same amount

Question 43

The energy per unit volume in an EM wave is -- divided between the electric and magnetic fields

Answer 43

equally

Question 44

How tall must a plane mirror be in order for you to be able to see your full image in it?

Answer 44

half of your height

Question 45

For all transparent material substances, the index of refraction is -- than 1

Answer 45

greater

Question 46

A telescope is considered to be a time machine looking backward, because speed of light is --

Answer 46

finite

Question 47

How large was the universe when the cosmic microwave background was released?

Answer 47

a factor of 1,100 smaller than today

Question 48

Who predicted the existence of anti-particles?

Answer 48

Dirac

Question 49

The mass of a positron is -- as the electron

Answer 49

same

Question 50

Your hands are attached to your body by

Answer 50

electromagnetic force

Question 51

Quark names

Answer 51

up, down, charm, strange

Question 52

Why didn't an abundance of elements heavier than helium form in the early universe? The expansion of the universe caused the -- and -- to drop too low for fusion to occur

Answer 52

temperature and density

Question 53

The Higgs mechanism explains the origin of

Answer 53

mass of particles

Question 54

The angle of incidence -- than the angle of refraction

Answer 54

may be greater, less or equal

Question 55

When light passes through a prism the color refracted the most is

Answer 55

violet

Question 56

If a person'e eyeball is too long from front to back, the person is likely to suffer from

Answer 56

nearsightedness

Question 57

Nearsightedness can usually be corrected with

Answer 57

diverging lenses

Question 58

The equation of continuity is a statement of conservation of -- applied to fluids in steady laminar flow?

Answer 58

mass

Question 59

The lift on an airplane wing is an application of

Answer 59

Bernoulli's principle

Question 60

A metal cylindrical sleeve has an inner radius A and an outer radius B. The metal has a positive thermal expansion coefficient. When the sleeve's temperature increases

Answer 60

both the inner and outer radii increase

Question 61

The number of molecules in on e mole of a substance is

Answer 61

the same for all substances

Question 62

The average molecular kinetic energy of a gas can be determined by knowing only

Answer 62

the temperature of the gas

Question 63

Is it possible to transfer heat from a hot reservoir to a cold reservoir?

Answer 63

yes it will happen naturally

Question 64

The type of heat transfer that occurs between warm food and the air in the room is principally

Answer 64

convective

Question 65

The redshift due to the Doppler effect is caused by the coerces of light moving -- from the Solar System

Answer 65

away

Question 66

In a p-type semiconductor, a hole is

Answer 66

a region where an electron is missing

Question 67

The nuclei of different isotopes have the same number of

Answer 67

protons

Question 68

When an unstable nucleus decays by emitting an alpha particle, the atomic mass number of the nucleus

Answer 68

decreases by 4

Question 69

The energy radiated by a star, such as the Sun, results from

Answer 69

fusion reactions

Question 70

Boiling temperature of water is

Answer 70

373 Kelvin

Question 71

The beginning of the Universe was -- dimensions

Answer 71

10

Question 72

How soon after the Big Bang did the universe become cool enough for neutral atoms to form (and thus the universe became transparent)?

Answer 72

300,000 years

Question 73

Electromagnetic radiation of 1 micron wavelength is called

Answer 73

infrared

Question 74

An example of an object which emits no radiation at all is

Answer 74

any object at a temperature of 0 K

Question 75

An iron core cannot support a star because iron cannot -- with other nuclei to produce energy

Answer 75

fuse

Question 76

The deviation of a lens from its ideal behavior is referred to as

Answer 76

aberration

Question 77

What principle is responsible for alternating light and dark bands when light passes through two or more narrow slits?

Answer 77

interference

Question 78

What is the difference between pressures inside and outside a tire called?

Answer 78

gauge pressure

Question 79

Salt water has greater density than fresh water. A boat floats in both fresh and salt water. Where is the buoyant force greater?

Answer 79

same

Question 80

According to the quark model, neutrons consists of

Answer 80

2 d-quarks and 1 u-quark

Question 81

In today's universe, compared to the number of protons, the number of anti-protons is

Answer 81

considered negligible