« previous next »

Author Question: A certain isotope has a half-life of 32.4 hr and a relative biological effectiveness of 3.50. A ... (Read 94 times)

jrubin

  • Hero Member
  • *****
  • Posts: 552
on: Jul 29, 2018
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
Reply #1 on: Jul 29, 2018
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
« previous next »
 

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Landmarks in the evolution of life on Earth Landmarks in the evolution of life on Earth
Normal changes in the breast during a woman's life span Normal changes in the breast during a woman's life span
A biological profile from the bony remains of an individual may be preferable to a DNA profile for a A biological profile from the bony remains of an individual may be preferable to a DNA profile for a
Do atheists have faith in life from non-life? Do atheists have faith in life from non-life?
The energy cycle of life The energy cycle of life
Tree of life Tree of life
Video: Magnetic resonance imaging (MRI)

For a complete list of videos, visit our video library