Ch.24 Physics Definitions

Question 1

Plum pudding model

Answer 1

negative electrons in a sea of positive charge

Question 2

Nucleon

Answer 2

proton or neutron

Question 3

Nucleon number

Answer 3

total number of protons and neutrons

Question 4

atomic number

Answer 4

number of neutrons in nucleus

Question 5

isotope

Answer 5

nuclei of same element and protons but different neutrons

Question 6

atomic mass unit

Answer 6

1/12 of carbon atom - 1.67x10^-27

Question 7

Strong nuclear force

Answer 7

force between all nucleons

Question 8

antiparticle

Answer 8

same mass, opposite charge

Question 9

weak nuclear force

Answer 9

responsible for beta decay

Question 10

fundemental particle

Answer 10

quarks, electrons, neutrinos

Question 11

hadrons

Answer 11

particles and antiparticles affected by strong nuclear force (protons, neutrons, mesons)

Question 12

quarks

Answer 12

make up hadrons u d c s t b

Question 13

baryons

Answer 13

hadrons made from 3 quarks (protons, neutrons

Question 14

leptons

Answer 14

particle and antiparticle unaffected by strong nuclear force (electrons, neutrinos, muons)

Question 15

Mesons

Answer 15

combination of quark and antiquark

Question 16

Charge of up charm and top quark

Answer 16

2/3

Question 17

Charge of down strange and bottom quark

Answer 17

-1/3

Question 18

Charge of electron muon and tau

Answer 18

-1

Question 19

Charge of W Bozon

Answer 19

+_1

Question 20

Spontanious defenition

Answer 20

the decay cannot be induced / occurs without external influence.

Question 21

What material can stop gamma radiation

Answer 21

1-10cm of lead

Question 22

What material can stop beta radiation

Answer 22

1-10mm of aluminium

Question 23

What material can stop alpha radiation

Answer 23

Sheet of paper

Question 24

How do you find uncertainty in a graph

Answer 24

(Line of worst fit - line of best fit)/line of best fit