Author Question: A certain isotope has a half-life of 32.4 hr and a relative biological effectiveness of 3.50. A ... (Read 106 times)

jrubin

  • Hero Member
  • *****
  • Posts: 552
A certain isotope has a half-life of 32.4 hr and a relative biological effectiveness of 3.50. A sample of this isotope initially delivers an absorbed dose of 0.240 Gy to 250 g of tissue.
 
  (a) What was the initial equivalent dose to the tissue in rem and in sieverts?
  (b) How many joules of energy did the 250-g sample initially receive from the isotope?
  What will be an ideal response?

Question 2

Carbon-14 has a half-life of 5730 y. A sample of wood has been recovered by an archaeologist. The sample is sent to a laboratory, where it is determined that the activity of the sample is 0.144 Bq/g.
 
  By comparing this activity with the activity of living organic matter,
  0.230 Bq/g, the scientist determines how old the wood sample is, or more precisely, when the tree that the sample came from died. How old is the sample of wood?
  A) 3870 y
  B) 4250 y
  C) 4590 y
  D) 2630 y
  E) 2940 y



prumorgan

  • Sr. Member
  • ****
  • Posts: 326
Answer to Question 1

Answer: (a) 84 rem, 0.84 Sv (b) 0.060 J

Answer to Question 2

Answer: A



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

For a complete list of videos, visit our video library