## 60 terms

### fundamental and derived units

2 basic types of measurement are

### fundamental units

units that measure a quantity by themselves without using any other units to express their measurement are known as what

### basic quantities

another name for fundamental units is what

### fundamental units

length, mass, time, and temperature are examples of what type of units

### meter

the standard unit of measurement for length is the

### kilogram

the standard unit of measurement for mass is the

### second

the standard unit of measurement for time is the

### kelvin

the standard unit of measurmement for temperature is the

### meter

si unit based on the speed of light

### kilogram

si unit based on the mass of 1000cm^3 of water @ 4* C

### second

si unit based on the vibration of atoms of cesium

### derived units

measurements that combine fundamental units are called

### derived units

example of this type of unit is velocity, acceleration, force

### mechanics

the branch of physics that deals with objects at rest and objects in motion is known as

### statics

branch of mechanics that deals with objects as rest is called

### dynamics

branch of mechanics that deals with objects in motion is called

### velocity

the speed at which an object is moving is known as

### c = 3x10^8 m/s

the velocity of light is

### acceleration

rate of change of velocity over time is known as

### inertia

newton's first law is the law of

### inertia

a body will remain at rest or continue to mvoe with constant velocity in a straight line unless acted on by an external force is Newton's first law of

### force

newton's 2nd law, the law of

### force

the force acting on an object with acceleration is equal to the mass multiplied by the acceleration; F = m * a is which law?

newton's 3rd law

### action/reaction

for every action there is an equal but opposite reaction is newton's law of

### inertia

the tendency of a moving body to remain in motion and a resting body to remain at rest is known as

### friction, gravity, mechanical force

3 forces that will change inertia are

### force

push or pull on an object is

si unit of force

### weight

the force on a body caused by the downward pull of gravity on it is

### newton

si unit of weight is the

### momentum

all objects in motion have this

### work

application of force to an object is konwn as

si unit of work

### power

the rate at which work is done is known as

unit of power

### energy

ability to do work

### potential and kinetic

two forms of mechanical energy

### heat

the kinetic energy of the random motion of molecules

unit of heat

### conduction

heat transferred by contact

### convection

heat transfer by a moving fluid or gas

heat transfer by infrared emission

### heat

this production is the one primary concern of xray tubes

an xray tube cools primarily by

### rontgen

special unit of exposure dose

special unit of absorbed dose

### rem

special unit of effective dose

### gray

si unit of exposure dose and absorbed dose

### seivert

si unit of effective dose

### exposure

xrays and gamma rays and their interationcs with air is ___ dose

### absorbed

applies to any type of ionizing radiation and any exposed matter is ___ dose

### effective

unit of occupational radiation exposure is ___ dose

the unit of quantity of radioactive material is the measurement of

### true

1 R = 1 rad = 1 rem t/f

### x.01

to change from a R, rad, or Rem to a Gray or Sievert u must do what?

### /0.01

to change from a SI unit to a conventional unit in radiology, u must do what?