Particles

Question 1

What is the unit of specific charge?

Answer 1

C/Kg

Question 2

Equation to find the energy of a wave using the frequency

Answer 2

E = hF

Question 3

Rest energy

Answer 3

E=mc^2

Question 4

What happens when a particle and corresponding antiparticle meet?

Answer 4

Annihilation takes place: two photons are created that travel perpendicular to the paths of the particles in opposite directions to each other, both have the same energy

Question 5

How is momentum conserved in annihilation?

Answer 5

Two photons are created

Question 6

Why are two photons created?

Answer 6

To converse momentum

Question 7

What is the strong nuclear force carrier?

Answer 7

Pion

Question 8

Electron exchange carrier

Answer 8

Virtual photon

Question 9

Leptons

Answer 9

Fundamental particles that are not quarks

Question 10

Baryons

Answer 10

Contain three quarks and will decay into protons

Question 11

Mesons

Answer 11

Contain only two quarks and so cannot decay into protons

Question 12

The paths in a cloud chamber are effected by?

Answer 12

Speed and/or charge

Question 13

Particle with the highest specific charge?

Answer 13

Electron

Question 14

How does the strong nuclear force effect nucleons?

Answer 14

At a distance of 0-0.5fm particles are repulsed from 0.5-3fm particles are attracted towards each other

Question 15

What is an alpha particle?

Answer 15

A helium nucleus: two protons and two neutrons

Question 16

What are the three ways to create antimatter?

Answer 16

1) Radioactive decay
2) Interactions with cosmic rays
3) High energy collisions

Question 17

Compare matter and the corresponding antimatter

Answer 17

Same mass but opposite charges

Question 18

Define an electron volt

Answer 18

The energy needed for an electron to more across a p.d. of one volt

Question 19

Conversion of joules to electron volts

Answer 19

J/1.6x10-19

Question 20

Conversion of electron volts to joules

Answer 20

eV x 1.6x10-19

Question 21

What happens to particles after pair production?

Answer 21

Each particle spirals in the opposite direction to each other due to difference in charge

Question 22

What kind of nuclei emit alpha radiation?

Answer 22

Heavy nuclei and some smaller neutron deficient nuclei