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Homework Help: Equation to calculate absorbed dose of radiation?

  1. Mar 1, 2017 #1
    1. The problem statement, all variables and given/known data
    Calculate the absorbed dose of radiation for tissue that suffers a mean energy absorbed of 420 Joules in a quantity of tissue that has a mass of 60g.

    2. Relevant equations
    This is really my question. No relevant equation is provided in these materials so my independent research (and the data given) suggests I could use D = E/M, but is that the most appropriate?

    3. The attempt at a solution
    D = E\M
    D = 420/60
    D = 7
    D = 7 J kg-1
  2. jcsd
  3. Mar 1, 2017 #2


    User Avatar
    Science Advisor
    Education Advisor

    Radiation dose is generally reported in terms of mean energy deposited per unit mass.

    You might want to double check the 60 g vs kg though.
  4. Mar 2, 2017 #3
    I've checked again and it is definitely 60 grams. Does that mean I need to equate the tissue dose to kg so it tallies with the final measure?

    D = E\M
    D = 420/0.06
    D = 7
    D = 7000 J kg-1
  5. Mar 4, 2017 #4


    User Avatar

    Staff: Mentor

    The final value looks good. I don't know what happened in the second to last line though.
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