Deck 32: Elementary Particles

Question 1

Choose the one alternative that best completes the statement or answers the question.
Which of the following particles are leptons? (There may be more than one correct choice.)

A) neutrons
B) electrons
C) protons
D) quarks
E) photons

Answer 1

B

Question 2

Choose the one alternative that best completes the statement or answers the question.
Inside the nucleus, the strongest of the four fundamental forces is

A) the gravitational force.
B) the strong nuclear force.
C) the weak nuclear force.
D) the electromagnetic force.

Answer 2

B

Question 3

Choose the one alternative that best completes the statement or answers the question.
How many quarks are in a tritium isotope, ${ } _ { 1 } ^ { 3 } \mathrm { H }$ ?

A) 6
B) 3
C) 4
D) 9
E) 2

Answer 3

D

Question 4

Write the word or phrase that best completes each statement or answers the question.
If a new force were discovered with a range on the order of $10 ^ { - 18 } \mathrm {~m}$ , predict the approximate mass of the exchange particle. $\left( c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

Question 5

Write the word or phrase that best completes each statement or answers the question.
What combination of quarks produces a neutron and what are the electric charges on
these quarks, expressed in terms of e?

Question 6

Choose the one alternative that best completes the statement or answers the question.
Which of the following particles (or groups of particles) are made up of quarks?

A) protons, neutrons, and electrons
B) electrons and neutrinos
C) protons and neutrons
D) photons
E) All particles except for photons are made up of quarks.

Question 7

Choose the one alternative that best completes the statement or answers the question.
Which of the following particles are not made up of quarks? (There could be more than one correct choice.)

A) proton
B) alpha particle
C) neutron
D) positron
E) electron

Question 8

Choose the one alternative that best completes the statement or answers the question.
How does the range of an exchange force depend on the mass of the exchange particle?

A) The range is shorter for a massive exchange particle than for a light exchange particle.
B) The range does not depend on the mass of the exchange particle.
C) The range is longer for a massive exchange particle than for a light exchange particle.

Question 9

Choose the one alternative that best completes the statement or answers the question.
The proton is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?

A) udd
B) uud
C) ttb
D) ddu
E) bst

Question 10

Choose the one alternative that best completes the statement or answers the question.
Which of the following statements about hadrons are correct? (There may be more than one correct choice.)

A) All hadrons interact by the strong nuclear force.
B) All hadrons are composed of quarks.
C) Protons and neutrons are hadrons, but the electron is not.
D) Hadrons are composed of leptons.
E) Electrons, protons, and neutrons are commonly-occurring hadrons.

Question 11

Choose the one alternative that best completes the statement or answers the question.
How many quarks are in a deuteron, ${ } _ { 1 } ^ { 2 }$ H?

A) 4
B) 9
C) 6
D) 2
E) 3

Question 12

Write the word or phrase that best completes each statement or answers the question.
What combination of quarks produces a proton and what are the electric charges on these
quarks, expressed in terms of e?

Question 13

Choose the one alternative that best completes the statement or answers the question.
The neutron is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?

A) ttb
B) ddu
C) uud
D) udd
E) bst

Question 14

Choose the one alternative that best completes the statement or answers the question.
Calculate an estimate of the range of a hypothetical force with the proton as the virtual exchange particle. $\left( c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } , m _ { \text {proton } } = 1.67 \times 10 ^ { - 27 } \mathrm {~kg} \right)$

A) $1.5 \times 10 ^ { - 15 } \mathrm {~m}$
B) $6.7 \times 10 ^ { - 25 } \mathrm {~m}$
C) $2.1 \times 10 ^ { - 16 } \mathrm {~m}$
D) $6.0 \times 10 ^ { - 8 } \mathrm {~m}$

Question 15

Choose the one alternative that best completes the statement or answers the question.
Elementary particles that experience the weak nuclear force but not the strong nuclear force are called

A) bosons.
B) baryons.
C) leptons.
D) hadrons.
E) mesons.

Question 16

Choose the one alternative that best completes the statement or answers the question.
Leptons can interact by which of the following forces?

A) strong nuclear force, weak nuclear force, electromagnetic force, gravitation
B) strong nuclear force, electromagnetic force, gravitation
C) strong nuclear force, weak nuclear force
D) weak nuclear force, electromagnetic force, gravitation
E) strong nuclear force, weak nuclear force, electromagnetic force

Question 17

Choose the one alternative that best completes the statement or answers the question.
The $\pi 0$ meson has a mass of 264 times that of an electron. What is the approximate range of the force mediated by this particle? ( electron $^ { \text {e } } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 }$ J.s)

A) $1.5 \times 10 ^ { - 10 } \mathrm {~m}$
B) $1.5 \times 10 ^ { - 14 } \mathrm {~m}$
C) $1.5 \times 10 ^ { - 12 } \mathrm {~m}$
D) $1.5 \times 10 ^ { - 15 } \mathrm {~m}$

Question 18

Choose the one alternative that best completes the statement or answers the question.
What are the possible charges of a quark (not an antiquark)?

A) $- 2 / 3 e _ { 1 } + 1 / 3 e$
B) $- 2 / 3 e _ { 1 } - 1 / 3 e _ { 1 } + 1 / 3 e _ { 1 } + 2 / 3 e$
C) $- 1 / 3 e _ { 1 } + 2 / 3 e$
D) $- 1 / 3 e _ { , } + 1 / 3 e$
E) $- e , 0 , e$

Question 19

Choose the one alternative that best completes the statement or answers the question.
Inside the nucleus, the weakest of the four fundamental forces is

A) the electromagnetic force.
B) the strong nuclear force.
C) the gravitational force.
D) the weak nuclear force.