Definitions

Question 1

Acceleration

Answer 1

Change of velocity per unit charge

Question 2

Apha radiation

Answer 2

Particles that each consist of two protons and two neutrons

Question 3

Amplitude

Answer 3

Maximum displacement of vibrating particle; for a transverse wave, it is the distance from the middle to the peak of the wave

Question 4

Annihilation

Answer 4

When a particle and its antiparticle meet, they destroy each other and become radiation

Question 5

Antibaryon

Answer 5

A hadron consisting of three antiquarks

Question 6

Antimatter

Answer 6

Antiparticles that each have the same rest mass and, if charged, have equal and opposite charge ti the corresponding particle.

Question 7

Antimuon

Answer 7

Antiparticle of a muon

Question 8

Antineutrino

Answer 8

Antiparticle of the neutrino

Question 9

Antinode

Answer 9

Fixed point in a stationary wave pattern where the amplitude is a maximum

Question 10

Antiparticle

Answer 10

A particle and it’s corresponding antiparticle have equal rest mass and, if charged, equal and opposite charge

Question 11

Baryon

Answer 11

A hadron consisting of three quarks

Question 12

Beta radiation

Answer 12

B- particles fast moving electrons emitted by unstable neutron rich nuclei or by free neutrons when they decay; B+ particles are fast moving positrons emitted by unstable proton-rich nuclei

Question 13

Braking distance

Answer 13

The distance travelled by a vehicle in the time taken to stop it

Question 14

Centre of definitions

Answer 14

the centre of mass