This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Over the course of 6 hours, 15 of a radioactive material decays. What is its half-life? a. 12.8 hrs ... (Read 32 times)

krzymel

  • Hero Member
  • *****
  • Posts: 548
on: Jul 28, 2018
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
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

A


krzymel

  • Hero Member
  • *****
  • Posts: 548
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


nhea

  • Sr. Member
  • ****
  • Posts: 305
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Overview of material uptake and long-distance transport processes in plants Overview of material uptake and long-distance transport processes in plants
Life-history cube, a classification of fish, mammals, and altricial birds based on three dimensionle Life-history cube, a classification of fish, mammals, and altricial birds based on three dimensionle
Dimensions of quality of life affected by cancer Dimensions of quality of life affected by cancer
Lewis Hine’s 1910 photograph shows a tenement alley in New York City. More famous for his “unsettlin Lewis Hine’s 1910 photograph shows a tenement alley in New York City. More famous for his “unsettlin
Multiple-dose drug administration. Drug A and drug B are administered every 12 hours. Drug B reaches ... Multiple-dose drug administration. Drug A and drug B are administered every 12 hours. Drug B reaches ...
Integrals for Life Integrals for Life
Video: Male Reproductive System - The gonadotropin releasing hormone

For a complete list of videos, visit our video library