Rad Physics 1
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What is the primary distinquishing charateristic of matter?
It has mass.

How is mass measured?
In kilograms(kg).

Define matter.
 Anything that occupies space and has mass

Define Energy
The ability to do work.

The tranfer of energy is ________.
radiation

The removal of an electron from an atom is called _____.
ionization

Xrays, gamma rays, and ultraviolet light are forms of
___________.
electromagnet radiation.

The largest source of enviornmenal radiation.
radon

What percentage of our annual radiattion dose is due to medical imaging?
51%

What was the name of the partially evacuated glass tube that Roentgen was experimentig with when he discovered xrays
Crookes tube

The fluorescent material used to coat the xray plate discovered accidently by Roentgen
barium platinocyanide

a roentgen(R) is called a __________ in SI units
and it measures_______.
air kerma (Gya), exposure
J/kg

a rad is called a ____________
in SI units and measures_________.
gray(Gyt), absorbed dose
rad stands for: radiation absorbed dose

A curie(Ci) is called a ______ in SI units and measures
________.
becquerel, radioactivity

A rem is called a ________ in SI units and measures
__________.
sievert, effective dose
(often used for occupational radiation monitoring)

What is a derived quantity?
 In physics there are three base quantities: mass, length, and time which are the building blocks of all other quantities. The derived quantities are a combination of one or more of the three base quantities.
 Examples: length cubed=volume, length/time =velocity

What does rem stand for?
 radiation equivalent man
 measures effective dose
 SI unit:Sievert(Sv)
 (some places I've seen Roentgen Equivalent Man)

___________ is the kinetic energy of molecules.
Heat

_________is the rate of doing work.
Power

Work /time or the rate of doing work is __________.
Power
(the rate of doing work)

The unit of work
Joule(J)

the SI unit for Power
joule/second J/s

_____________is the kinetic energy transferred from photons to electron during ionization and excitation.
Air Kerma(Kinetic energy released in mattter) Gya

_______is the quantity of matter as described by it's energy equivalence.
mass

Energy is measured in
joules (j)

Energy emitted and transferred through space is called
_________.
radiation

Natural enviornmental radiation results in an annual dose of approximately___________.
3 mSv

Of the three principle radiation controls:
time, distance, and shielding, which is most important?
shielding

Radiation exposure is measured in
Special units:_____________ and
SI units_____________________.
C/kg(coulumb/kg), Air kerma(Gya)
 (old unit the roentgen(R) )

Radiation dose is measured in
Special units:_______________and
SI units_____________________.

Effective dose is masured in
Special units:________________and
SI units_____________________.
J/kg, Sieverts(Sv)
(old unit rem)

The mass of an object times it's velocity is it's
____________.

Resistance to change in motion is_______________.
inertia

____________is the ability to do work.
energy

The force required to change the state of motion of an object is ______ proportional to the product of the _____
and the ____________.
 directly, mass, acceleration
 F = ma.
 NEWTON'S 2ND LAW

For every action there is an _______and_________
reaction.
 equal,opposite
 NEWTON'S 3RD LAW
 ACTION/REACTION
 Example:if we step off a boat onto the bank of a lake: as we move in the direction of the shore, the boat tends to move in the opposite direction (leaving us facedown in the water, if we aren't careful!).

Which Newton's law does this illustrate?
 Newton's 2nd law
 the law of force

Which Newton law does this illustrate?
 Newton's 1st law
 The law of inertia

what is constant and is symbolized by C:C=3x10^8 m/s?
Velocity of light

a weight lifted through a height is _______.
WORK SI unit is joules(J)
W=fd force is expressed in Newtons and distance in Meters

joule per second
J/s
power

The equation for power is___________and the SI unit
is___________.
P=fd/t which is the same as work divided by time
force(newtons) times distance(meters) =work(joules) divided by time in seconds
SI unit: J/s

Describe three kinds of heat transfer illlustrated in this picture.

What does ALARA stand for?

Particulate and electromagnetic radiation emitted by the sun and stars are called _______.
cosmic rays

The ejected electron and the resultant positively charged atom is called the _______.
ion pair

What are the three components of natural environmental
radiation?
 Cosmic rays
 terrestrial radiation
 internally deposited radionucli

terrestrial radiation
results from deposits of uranium, thorium, and other radionuclides in the Earth

unit that applies only to xrays and gamma rays and their interactions with air
Roentgen(R)

A major source of radon is________.
granite

fastmoving particles capable of ionization
alpha and beta particles