What is the primary distinquishing charateristic of matter?
It has mass.
How is mass measured?
- Anything that occupies space and has mass
The ability to do work.
The tranfer of energy is ________.
The removal of an electron from an atom is called _____.
X-rays, gamma rays, and ultraviolet light are forms of
The largest source of enviornmenal radiation.
What percentage of our annual radiattion dose is due to medical imaging?
What was the name of the partially evacuated glass tube that Roentgen was experimentig with when he discovered x-rays
The fluorescent material used to coat the xray plate discovered accidently by Roentgen
a roentgen(R) is called a __________ in SI units
and it measures_______.
air kerma (Gya), exposure
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
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.
_________is the rate of doing work.
Work /time or the rate of doing work is __________.
(the rate of doing work)
The unit of work
the SI unit for Power
_____________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.
Energy is measured in
Energy emitted and transferred through space is called
Natural enviornmental radiation results in an annual dose of approximately___________.
Of the three principle radiation controls:
time, distance, and shielding, which is most important?
Radiation exposure is measured in
Special units:_____________ and
C/kg(coulumb/kg), Air kerma(Gya)
- (old unit the roentgen(R) )
Radiation dose is measured in
Effective dose is masured in
(old unit rem)
The mass of an object times it's velocity is it's
Resistance to change in motion is_______________.
____________is the ability to do work.
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_________
- NEWTON'S 3RD LAW
- 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
The equation for power is___________and the SI unit
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 _______.
The ejected electron and the resultant positively charged atom is called the _______.
What are the three components of natural environmental
- Cosmic rays
- terrestrial radiation
- internally deposited radionucli
results from deposits of uranium, thorium, and other radionuclides in the Earth
unit that applies only to x-rays and gamma rays and their interactions with air
A major source of radon is________.
fast-moving particles capable of ionization
alpha and beta particles