This topic contains a solution. Click here to go to the answer

Author Question: Over the course of 6 hours, 15 of a radioactive material decays. What is its half-life? a. 12.8 hrs ... (Read 91 times)

krzymel

  • Hero Member
  • *****
  • Posts: 548
Over the course of 6 hours, 15 of a radioactive material decays. What is its half-life?
 a. 12.8 hrs
  c. 4.1 hrs
  b. 25.6 hrs
  d. 68.6 hrs

Question 2

Approximately how many half-life periods must elapse if the activity of a radioactive isotope sample is to be reduced to 0.03 of the original value?
 a. 5
  c. 8
  b. 3
  d. 60



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

nhea

  • Sr. Member
  • ****
  • Posts: 305
Answer to Question 1

B

Answer to Question 2

A



krzymel

  • Hero Member
  • *****
  • Posts: 548
Both answers were spot on, thank you once again



nhea

  • Sr. Member
  • ****
  • Posts: 305

 

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

For a complete list of videos, visit our video library