Physics Lecture 1

Question 1

Define mass

Answer 1

quantity of matter as described by its energy equivalents

Question 2

Define force

Answer 2

That which changes the motion of an object a push or pull expressed in newtons (N)

Question 3

Define energy

Answer 3

Ability to do work standard unit is joules (J) (radiology KeV)

Question 4

What can be classified as matter or energy?

Answer 4

All things

Question 5

What does the theory of relativity explain?

Answer 5

Mass and energy are interchangeable

Question 6

Define radiation?

Answer 6

Energy emitted and transfered through space

Question 7

Define radiated?

Answer 7

Matter that absorbs part or all radiation

Question 8

What is the Radioactivity Traditional unit and SI unit

Answer 8

1. Curie (Ci)
2. Becquerel (Bq)
   1Bq=2.7x10^-11Ci

Question 9

What is the Radiation exposure Traditional unit and SI unit

Answer 9

1. Roentgen (R)
2. Coulombs per kilogram (C/kg)
   1C/kg=3.88x10^5R

Question 10

What is the Radabsorbed dose Tradition unit and SI unit

Answer 10

1. Rad
2. Gray (Gy)
   1Gy=100rad

Question 11

What is the Radiation dose equivalent Traditional unit and SI unit

Answer 11

1. Rem
2. Sivert (SV)
   1SV=100rem

Question 12

Define Rad exposure

Answer 12

The total amount of ionizations in the air produced by photons

Question 13

Define air kerma

Answer 13

Kinetic energy released in the medium per unit mass at a specific point, unable to show locally absorbed energy

Question 14

Air kerma unit is the same as?

Answer 14

Absorbed dose

Question 15

Effective dose measures is?

Answer 15

The difference in radiation responce in different organs and tissues (SI:Rem T:SV)

Question 16

The effective dose is calculated for the?

Answer 16

Whole body

Question 17

The calculated dose is calculated for the?

Answer 17

Individual organs

Question 18

How is heat transfered?

Answer 18

By radiation,conduction and convection (unit:calorie)

Question 19

In C what is boiling and freezing temps

Answer 19

1. Boiling 100C
2. Freezing 0C

Question 20

In K what is boiling and freezing temps

Answer 20

1. Boiling 373.15K
2. Freezing 273.15K

Question 21

In F what is boiling and freezing temps

Answer 21

1. Boiling 132F
2. Freezing 32F

Question 22

What is the absolute zero in C,K and F

Answer 22

1. -273.15C
2. 0K
3. −459.67

Question 23

First law of inertia

Answer 23

Object in motion or in rest will continue until acted upon by external force

Question 24

Second law of inertia

Answer 24

The force that acts on a object is equal to the mass (m) of the object multiplied by the acceleration (a)
(F=ma)

Question 25

Third law of inertia

Answer 25

For every action there is an equal and opposite reaction.

Question 26

Define atom

Answer 26

The smallest particle that cant be divided or broken by chemical means

Question 27

What is electromagnetism?

Answer 27

The force responsible for interactions between electrically charged particles (binds a lot of shit)

Question 28

Protons and neutrons together are called

Answer 28

nucleons

Question 29

What is electron binding energy?

Answer 29

The strenght attachment of an electron to the nucleus

Question 30

From Shell 1(k) - 7(Q). How many electrons are in each shell. (2N^2)

Answer 30

1. 2
2. 8
3. 18
4. 32
5. 50
6. 72
7. 98

Question 31

What are elements

Answer 31

Atoms that have the same atomic number nad chemical properties

Question 32

What is a compound

Answer 32

Various combinations of elements

Question 33

What is a mixture?

Answer 33

Material that is made up of two or more compunds or substances that do not combine chemically

Question 34

How is electification created?

Answer 34

contact, friction or induction

Question 35

What is the law of electrostatics?

Answer 35

1. Like charges repel
2. Electric charge of a conductor is concentrated along the sharpest curvature of the surface
3. Electric charge distribution is uniform on surface
4. Electrostaic force is proprtional to the products electrostatic charge, and inversely to the proportional square of the distance between them