Question 1

How many quark flavors are there?

Accepted Answer

A)  1 
B)  3 
C)  6 
D)  none of the above

Question 2

A __________ does not interact via the strong interaction.

Accepted Answer

The answer of A __________ does not interact via the...

Question 3

Any particle with spin obeys the Pauli exclusion principle.

Accepted Answer

A) True 
 B)False

Question 4

At speeds approaching the speed of light, the kinetic energy of a moving object is equal to

Accepted Answer

A)  1/2 mv 2. 
B)  1/2 mc 2. 
C)   . 
D)   . 
E)  none of the above.

Question 5

If a twin goes on a trip in a high-speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of

Accepted Answer

A)  time dilation. 
B)  length contraction. 
C)  the equivalence of mass and energy. 
D)  the principle of relativity. 
E)  none of the above.

Question 6

Leptons are built out of quarks.

Accepted Answer

A) True 
 B)False

Question 7

Einstein's famous equation E  = mc2 is a statement of the equivalence of energy and the square of the speed of light.

Accepted Answer

A) True 
 B)False

Question 8

Because of their short lifetimes, very few muons that are produced in the upper atmosphere at high speeds should be observed at the surface of the Earth. Yet we detect large numbers of muons at ground level because of

Accepted Answer

A)  time dilation. 
B)  length contraction. 
C)  the equivalence of mass and energy. 
D)  the principle of relativity. 
E)  none of the above.

Question 9

If you are driving down a highway at 65 mph with your headlights on, the speed of the light emitted from your headlights as seen by a person standing on the side of the road is

Accepted Answer

A)  c. 
B)  c + 65 mph. 
C)  slightly greater than c. 
D)  none of the above.

Question 10

If a twin goes on a trip in a high-speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of the special relativistic effect of __________.

Accepted Answer

The answer of If a twin goes on a trip...

Question 11

The mass of an electron and its antiparticle, a positron, is 0.511 MeV/c ². In order to produce an electron-positron pair, a gamma ray must have an energy larger than 1.022 MeV because __________.

Accepted Answer

The answer of The mass of an electron and its...

Question 12

The electron

Accepted Answer

A)  is an absolutely stable particle. 
B)  decays via the weak interaction. 
C)  has zero mass. 
D)  is a lepton.

Question 13

The quark structure of the proton is __________.

Accepted Answer

The answer of The quark structure of the proton is...

Question 14

What is the quark structure of an electron?

Accepted Answer

A)  uud 
B)  udd 
C)  uuu 
D)  ddd 
E)  the question does not make sense

Question 15

t and b quarks are named

Accepted Answer

A)  truth and beauty. 
B)  up and down. 
C)  top and bottom. 
D)  Itchy and Scratchy. 
E)  none of the above.

Question 16

(a) What is the rest energy (in joules) of a subatomic particle whose (rest) mass is 6.7 × 10 ⁻ ³¹ kg? (b) How many MeV's of energy is this?

Accepted Answer

The answer of (a) What is the rest energy (in...

Question 17

The spins of all known particles are either integral or half-integral multiples of

Accepted Answer

A)  the baryon number. 
B)  Plank's constant. 
C)  the Gravitational constant. 
D)  the speed of light.

Question 18

From the point of view of a muon produced high in the atmosphere, the reason it can get to the ground before it decays is because

Accepted Answer

A)  relativity gives it extra time to get there. 
B)  of the uncertainty principle. 
C)  it is a short distance to the ground. 
D)  relativity shortens the distance to the ground.

Question 19

Because of the equivalence of mass and energy, an electron and a positron, which are two massive particles, can annihilate when they come together to produce two photons, which have no mass.

Accepted Answer

A) True 
 B)False

Question 20

Quarks come in what flavors?

Accepted Answer

A)  up, down and strange 
B)  charm, top and bottom 
C)  red, green and blue 
D)  all of the above

Exam 12: Special Relativity and Elementary Particles

How many quark flavors are there?

A __________ does not interact via the strong interaction.

Any particle with spin obeys the Pauli exclusion principle.

At speeds approaching the speed of light, the kinetic energy of a moving object is equal to

If a twin goes on a trip in a high-speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of

Leptons are built out of quarks.

Einstein's famous equation E = mc² is a statement of the equivalence of energy and the square of the speed of light.

Because of their short lifetimes, very few muons that are produced in the upper atmosphere at high speeds should be observed at the surface of the Earth. Yet we detect large numbers of muons at ground level because of

If you are driving down a highway at 65 mph with your headlights on, the speed of the light emitted from your headlights as seen by a person standing on the side of the road is

If a twin goes on a trip in a high-speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of the special relativistic effect of __________.

The mass of an electron and its antiparticle, a positron, is 0.511 MeV/c ². In order to produce an electron-positron pair, a gamma ray must have an energy larger than 1.022 MeV because __________.

The electron

The quark structure of the proton is __________.

What is the quark structure of an electron?

t and b quarks are named

(a) What is the rest energy (in joules) of a subatomic particle whose (rest) mass is 6.7 × 10 ⁻ ³¹ kg? (b) How many MeV's of energy is this?

The spins of all known particles are either integral or half-integral multiples of

From the point of view of a muon produced high in the atmosphere, the reason it can get to the ground before it decays is because

Because of the equivalence of mass and energy, an electron and a positron, which are two massive particles, can annihilate when they come together to produce two photons, which have no mass.

Quarks come in what flavors?

Exam 12: Special Relativity and Elementary Particles

How many quark flavors are there?

A __________ does not interact via the strong interaction.

Any particle with spin obeys the Pauli exclusion principle.

At speeds approaching the speed of light, the kinetic energy of a moving object is equal to

If a twin goes on a trip in a high-speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of

Leptons are built out of quarks.

Einstein's famous equation E = mc2 is a statement of the equivalence of energy and the square of the speed of light.

Because of their short lifetimes, very few muons that are produced in the upper atmosphere at high speeds should be observed at the surface of the Earth. Yet we detect large numbers of muons at ground level because of

If you are driving down a highway at 65 mph with your headlights on, the speed of the light emitted from your headlights as seen by a person standing on the side of the road is

If a twin goes on a trip in a high-speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of the special relativistic effect of __________.

The mass of an electron and its antiparticle, a positron, is 0.511 MeV/c 2. In order to produce an electron-positron pair, a gamma ray must have an energy larger than 1.022 MeV because __________.

The electron

The quark structure of the proton is __________.

What is the quark structure of an electron?

t and b quarks are named

(a) What is the rest energy (in joules) of a subatomic particle whose (rest) mass is 6.7 × 10 − 31 kg? (b) How many MeV's of energy is this?

The spins of all known particles are either integral or half-integral multiples of

From the point of view of a muon produced high in the atmosphere, the reason it can get to the ground before it decays is because

Because of the equivalence of mass and energy, an electron and a positron, which are two massive particles, can annihilate when they come together to produce two photons, which have no mass.

Quarks come in what flavors?

Einstein's famous equation E = mc² is a statement of the equivalence of energy and the square of the speed of light.

The mass of an electron and its antiparticle, a positron, is 0.511 MeV/c ². In order to produce an electron-positron pair, a gamma ray must have an energy larger than 1.022 MeV because __________.

(a) What is the rest energy (in joules) of a subatomic particle whose (rest) mass is 6.7 × 10 ⁻ ³¹ kg? (b) How many MeV's of energy is this?