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Flashcards in Fundamentals of Radiology Deck (37):
1

Matter is anything that occupies space and has...

Mass

2

All matter is composed of fundamental building blocks called...

Atoms

3

That quantity of matter contained in any physical object is?

Mass

4

What is the unit of energy used in Radiology?

eV (electron bolt)

5

Energy is defined as...

The ability to do work

6

What is potential energy (PE)?

The ability to do work by virtue of position

7

What is kinetic energy (KE)?

Energy of motion

8

What is Electrical energy?

Work that can be done when an electron moves through an electric potential difference (voltage)

9

Thermal energy (heat)?

-Energy of motion at the molecular level
-The kinetic energy of molecules

10

Nuclear energy?

Energy that is contained within the nucleus of an atom
*Controlled =>Nuclear Reactor
*Uncontrolled => Atomic Bomb

11

Electromagnetic energy?

Energy that is transmitted through space as a combination of electric and magnetic fields

12

The most important type of energy in the field of radiology is?

-Electromagnetic energy
*x-rays are a form of EM energy

13

Electromagnetic energy is sometimes referred to as...

Radiant energy or radiation

14

What is ionizing radiation?

Any type of radiation that is capable of removing an orbital electron from the atom with which it interacts

15

Matter and ______ are interchangeable.

Energy

16

What are the (3) basic measurable quantities?

1. Length
2. Mass
3. Time

17

What are the building blocks of all other quantities?

-Length
-Mass
-Time

18

How many feet are in a mile?

5,280

19

What is the unit of mass?

Kilogram
1 kg= the has of 1000cm3 of water at 4°C

20

What is the unit of time?

-The Second
-Based on the vibration of Cesium atoms

21

What is velocity?

-Speed
-Measure of how fast an object is moving
-Rate of change of its position with time

22

What is acceleration?

-The rate of change of velocity with time
-Measure of how quickly or slowly velocity is changing

23

What's Newton's First law of Motion?

A body will remain at rest or will continue to move with constant velocity in a straight line unless acted on by an external force

24

What's Newton's Second law of Motion?

The force (f) that acts on an object is equal to the mass (m) of the object times the acceleration produced. F=ma

25

What's Newton's Third law of Motion?

For every action, there is an equal and opposite reaction

26

What is weight?

The force on a body due to the pull of gravity?

27

The value of acceleration due to gravity on the moon is only about ______ that on the Earth.

1/6

28

Define Work?

The force applied to an object times the distance over which it is applied

29

Define Power?

The rate of doing work

30

Define Heat?

The KE of the random motion of molecules

31

What can excessive heat do to the x-ray tube?

Cause permanent damage

32

What is scientific notation?

Method of expressing very large or very small numbers using exponents

33

Mega:

One million

34

Kilo:

One thousand

35

Centi:

One one hundredth

36

Milli:

One one thousandth

37

Micro:

One one millionth