Chapter 2

Question 1

What are quarks?

Answer 1

Baryons and mesons aren’t fundamental particles, they are made up of smaller particles, quarks

Question 2

What force do quarks feel?

Answer 2

Strong

Question 3

What interactions do quarks undergo?

Answer 3

Strong and weak

Question 4

Are quarks fundamental particles?

Answer 4

Yes

Question 5

How many quarks are found in an area?

Answer 5

2 or 3. Never found in isolation

Question 6

What are hadrons made up of?

Answer 6

Quarks

Question 7

What is the quark combination for a proton, charge and baryon number?

Answer 7

uud, +1, 1

Question 8

What quarks are baryons made up of?

Answer 8

3 quarks, q q q

Question 9

What is the quark combination for a neutron, charge and baryon number?

Answer 9

udd, 0, 1

Question 10

Symbol, relative mass, charge, baryon number and strangeness for up quark

Answer 10

Sym = u
Mass = 1
Charge = +2/3
B = +1/3
S = 0

Question 11

Symbol, relative mass, charge, baryon number and strangeness for down

Answer 11

Sym = d
Mass = 2
Charge = -1/3
B = +1/3
S = 0

Question 12

Symbol, relative mass, charge, baryon number and strangeness for strange

Answer 12

Sym = s
Mass = 1
Charge = -1/3
B = +1/3
S = -1

Question 13

What are charged pions made up of?

Answer 13

Quark anti quark pair

Question 14

What is the baryon number for all pions?

Answer 14

0

Question 15

What is the charge for pion+, pion-, pion ^0

Answer 15

pion+ = 1
pion- = -1
pion^0 = 0

Question 16

What quarks make up pions?

Answer 16

pion+ = u anti d
pion- = anti u d
pion^0 = u anti u, d anti d, s anti s

Question 17

What happens when a quark undergoes strong interaction?

Answer 17

Number and types of quarks are conserved

Question 18

What happens when a quark undergoes weak interaction?

Answer 18

Number and types of quarks can change, individual quarks can change from 1 type to another