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25 Cards in this Set

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What units are all considered equivalent
Roentgen, Rad and Rem can all be considered equivalent (as long as there is no quality factor or modifying factor)
What are the common units of roetgens
The roentgen measures the energy produced by gamma radiation in a cubic centimeter of air. It is usually abbreviated with the capital letter "R". A milliroentgen, or "mR", is equal to one one-thousandth of a roentgen. An exposure of 50 roentgens would be written "50 R".
What are rads
Radiation Absorbed Dose recognizes that different materials that receive the same exposure may not absorb the same amount of energy. A rad measures the amount of radiation energy transferred to some mass of material, typically humans. One roentgen of gamma radiation exposure results in about one rad of absorbed dose.
What are rem
Roentgen Equivalent Man is a unit that relates the dose of any radiation to the biological effect of that dose. To relate the absorbed dose of specific types of radiation to their biological effect, a "quality factor" must be multiplied by the dose in rad, which then shows the dose in rems. For gamma rays and beta particles, 1 rad of exposure results in 1 rem of dose.
Sample conversion
simple math: put the known units opposite each other with the unknown on the bottom left then cross out. What ever fraction is left over is the answer
Common units of conversion
How does the unit conversion technique work
Remember! you must make the units match the conversion ration that you have memorized and that means using scientific notation or changing units
Not how you are not cross multiplying
it might be easier to convert the second fraction into a number (0.5) in this case and then multiply it
Writting in scientific notation
Note that if the decimal went the other way the power would be negative
Where does the decimal go in scientific notation
as shown. Keep in mind if you are making a big number small than the exponent will be positive and if a small number is made big than it will be negative
Multiplying scientific notation
just add exponts and multiply whole numbers (not sure if ill ever use this)
Just subtract the bottom exponent from the topexponent
Subtract the bottom exponent from the top exponent
How do you adjust the exponents when moving the decimal
If you move the decimal further to the right you are decreasing the size of the exponent
general rule of thumb when moving decimals
What if the bottom exponent is bigger than the top
it becomes negative
100rad/1Gray
100rad/1gray
100rem/1sv
100rem/1sv
1 millicurie (mCi) = 37 megabecquerels (MBq)
1 millicurie (mCi) = 37 megabecquerels (MBq)
1 roentgen (R) =
2.58x 10^-4coulomb/kilogram (C/kg)
1 roentgen (R) =
2.58x 10^-4coulomb/kilogram (C/kg)
1rad = 1rem =1R
1 rad =1rem=1R
When converting between units
you have the reverse the exponent sign. For example there are 1000 milirems in 1 rem
Another way to think about it is
take the exponent of the thing you are trying to convert to and then assign that to the unit for instance milimeters to meters you can say there are 1x10^-3 meters in 1mm
10mGy=1rad (important to know bc all the bullshit dose limits are in rads or rems and the machines give you mGy)
10mGy=1rad (important to know bc all the bullshit dose limits are in rads or rems and the machines give you mGy)
10mGy=1rad (important to know bc all the bullshit dose limits are in rads or rems and the machines give you mGy)
10mGy=1rad (important to know bc all the bullshit dose limits are in rads or rems and the machines give you mGy)
Simple and fast reminder on how to do logs
http://www.youtube.com/watch?v=F1BdAhjM5x8&feature=relmfu