Topic 7 Physics

Question 1

What is a quark?

Answer 1

elementary particle

Question 2

What are the two main types of quarks?

Answer 2

Hadrons - quarks w/ weak nuclear bond & consist of mesons and baryons
Leptons - quarks w/ strong nuclear bond

Question 3

What are baryons?

Answer 3

heavy subatomic particles that are made up of 3 quarks

Question 4

What does the baryon neutron consist of?

Answer 4

ddu

Question 5

What does the baryon proton consist of?

Answer 5

uud

Question 6

What are mesons?

Answer 6

subatomic particles that are made up of a quark and an anti-quark

Question 7

What are leptons?

Answer 7

subatomic particles that are not affected by strong nuclear forces but are affected by weak forces

Question 8

What are the four fundamental forces from strongest to weakest?

Answer 8

Strong nuclear force, electromagnetic force, Weak nuclear force, gravitational force

Question 9

What are the Feynman Diagrams?

Answer 9

Feynman diagrams are used to express the behavior of subatomic particles over time

Question 10

Draw the Feynman diagram when a photon is being absorbed by an electron

Answer 10

check book

Question 11

Draw the Feynman diagram when a positron absorbs a photon

Answer 11

check book

Question 12

Draw the Feynman diagram when an electron emits a photon

Answer 12

check book

Question 13

Draw the Feynman diagram when a photon materializes from an electron positron-pair

Answer 13

check book

Question 14

Draw the Feynman diagram when an electron and positron collide producing a photon

Answer 14

check book

Question 15

Draw the Feynman diagram when an electron and positron collide producing a photon. The photon then materializes into a new particle and anti-particle

Answer 15

check book

Question 16

Draw the Feynman diagram when a d quark changes into a u quark

Answer 16

emits a w- boson

Question 17

Draw the Feynman diagram when an electron changes into an electron neutrino

Answer 17

emits a w- boson

Question 18

Draw the Feynman diagram when a muon changes into a muon neutrino

Answer 18

emits a w- boson

Question 19

Draw the Feynman diagram when an electron stays an electron but emits a certain boson

Answer 19

emits Z^o boson

Question 20

What is alpha decay?

Answer 20

Radioactive decay that emits an alpha particle (4 2 Helium )

Question 21

What is negative beta decay?

Answer 21

Radioactive decay that emits an electron and a neutrino

Question 22

What is positive beta decay?

Answer 22

Radioactive decay that emits a positron and a neutrino

Question 23

What is a gamma emission?

Answer 23

Radioactive decay of atomic nuclei that emits a photon. The electrons in the element on the reactants side go down energy levels.