Ch 2  Vanderschaff
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Maginification =
SID / SOD

Velocity=
Distance / Time

Force=
(N)= Mass x Acceleration


Momentum=
(P) = Mass x Velocity

Work=
(J) = Force x Distance



PE=
Mass x Gravity x Height

K=
F=
C=
 K=C+273
 F=9/5(C) + 32
 C=5/9 x (F32)

Physics
Interactions of matter and energy in all their forms




Speed of light =
c=3 x 10^8 m/s




Meter is defined by...
The distance traveled by light

Unit of measurement?
Kilogram

Unit of Weight or Force?
Newton or Pound



Unit for ionization intensity in air?
Roentgen (R)

Xray unit output expressed in?
mR

What is a kg?
Mass of 1000cm^3 of water at 4 deg Celsius

Standard unit of time
Second

How is time measured?
By atomic clock and the vibration of cesium atoms


What are Newton's laws of motion?
 1.) Inertia
 2.) Force
 3.) Action/Reaction

Law of inertia?
Body will remain at rest or will continue to move in a straight line at a constant rate unless acted on by an external force.

Law of Force?
Force of an object is equal to Mass x Acceleration

Law of Conservation of Energy
Energy can be transformed from one form to another, but cannot be created or destroyed

The total amount of energy is ____?
Constant

What is heat?
KE of the random motion of molecules

What is a calorie?
The amount of heat needed to raise the temp. of 1 gram of water by 1 deg Celsius

Heat is transferred by what 3 methods?
 Convectional
 Conduction
 Radiation (Thermal)

What is a cryogen?
Extremely cold liquid

Liquid nitrogen boils at?
77K


"Standard Units of Measurement" issued by who and when?
ICRU / 1981

1 (R) is equivalent to ___ ion pairs in one __ __ of air?
2.08 x 10^9 .... cubic centimeter

C/kg^3 =
=
=
Coulombs/Kilogram
1 R
2.58 x 10^4

RAD stands for?
Radiation Absorbed Dose (Traditional Unit)

Gy stand for?
Gray (SI Unit)

How many RADs in 1 Gray?
100.... 100 RAD = 1 Gray

Relationship between "rem" and "sV"
100rem = 1 sV

Relationship between "Ci" and "Bq"?
 Ci = Curie (Traditional)
 Bq = Bequerel (SI)
 1 Ci = 3.7 x 10^10 Bq

RAD and Gray measure?
PT Dose

rem and sV measure?
Occupational Dose

Ci and Bq measure?
Quantity of radioactive material in DPS (Disentegrations per second)...