Physics exam prep

Question 1

Beta minus Decay

Answer 1

In beta minus decay, a neutron in an unstable nucleus is converted to a proton and electron.

Question 2

Define beta plus decay

Answer 2

In beta plus decay, a proton in an unstable nuclei is converted to a neutron and a position.

Question 3

Define gamma decay

Answer 3

In gamma decay an unstable nucleus ejects gamma radiation

Question 4

What radiation is the most penetrating

Answer 4

gamma

Question 5

Which radiation has the most ionizing power

Answer 5

alpha

Question 6

Define alpha decay

Answer 6

In alpha decay an unstable nucleus ejects an alpha particle- 2 protons and 2 neutrons

Question 7

Define heat in a substance

Answer 7

Heat in a substance is obtained by adding up all of the kinetic energy of all the substance molecules

Question 8

Define the temperature of a substance

Answer 8

The temperature of a substance indicated the average kinetic energy of the molecules of a substance

Question 9

Heat always passes from a substance of a …..temperature to a substance of a …..temperature

Answer 9

hotter to cooler

Question 10

define conduction

Answer 10

conduction is the process of which heat is passed on through the material of a substance

Question 11

define convection

Answer 11

Convection is the process of which heat is transferred through air or liquid currents.

Question 12

define radiation

Answer 12

heat is transferred to a different substance via electromagnetic waves

Question 13

how protons in Zn (66 and 30) and how many neutrons

Answer 13

There are 30 protons and 36 neutrons in Zn

Question 14

formula for finding out 1/8 of 1g of carbon if the half life is 5370

Answer 14

Log⁡ final amount
initial amount x half life
Log(0.5)

Question 15

define a very high specific heat capacity

Answer 15

having a high specific heat capacity means something will take a long time to cool down because it needs more energy

Question 16

what are isotopes

Answer 16

isotopes are atoms with the same elements but different mass numbers

Question 17

what is the nucleus held together by

Answer 17

A strong nuclear force

Question 18

what is half-life

Answer 18

Half-life is the time required for half of a radioactive nuclei to decay

Question 19

What do control rods do?

Answer 19

=>Goes down to Absorb neutrons to slow down or stop the nuclear chain reaction.
=>Goes up to NOT absorb and increases the amount of fission neutrons
=>Maintain a balanced reaction by adjusting their position.