Particles

Question 1

How do you calculate specific charge?

Answer 1

Charge/mass

Question 2

Why do large nuclei decay?

Answer 2

Range of strong nuclear force is very small so struggles to hold large nuclei together

Question 3

How can you demonstrate how far alpha particles can travel?

Answer 3

Their tracks in a cloud chamber only go a few meters

Question 4

What do particles and anti-particles have in common?

Answer 4

Equal but opposite charge, mass and same rest energy

Question 5

What do baryons decay by?

Answer 5

Weak nuclear force

Question 6

What do meason decay by?

Answer 6

The strong force

Question 7

What force do hadrons feel

Answer 7

The strong force

Question 8

What particles dont feel the strong force?

Answer 8

Leptons

Question 9

How are strange particles created?

Answer 9

Via the strong interaction

Question 10

When is strangeness conserved?

Answer 10

The strong force

Question 11

What’s special about strange particles?

Answer 11

Always produced on pairs

Question 12

What force do strange particles decay by?

Answer 12

Weak interaction

Question 13

What quark changes in beta minus decay?

Answer 13

Neutron to proton so down to up quark

Question 14

What is the baryon number of all quarks?

Answer 14

+1/3

Question 15

What is an exchange particle?

Answer 15

A virtual particle that lets a force act between two particles in an interaction

Question 16

When does electron capture occur?

Answer 16

An atom is proton rich

Question 17

What boson is exchanged in electron capture and collision?

Answer 17

Capture=W+

Collision=W-

Question 18

What experiences the weak force?

Answer 18

Hadrons and leptons

Question 19

Why do pions have an unusually long life?

Answer 19

They contain a strange quark

Question 20

When is strangness conserved?

Answer 20

Strong force

Question 21

What is the decay of a neutron?

Answer 21

n–> p+ e- + vê