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 71 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?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Situation in a Guy's Life Situation in a Guy's Life
Fern Life Cycle Fern Life Cycle
Chemistry of life: four key concepts Chemistry of life: four key concepts
Single-dose drug administration: pharmacokinetic values for this drug are as follows: onset of actio Single-dose drug administration: pharmacokinetic values for this drug are as follows: onset of actio
Embryonic Period - After fertilization (at about 24 hours) Embryonic Period - After fertilization (at about 24 hours)
Sexual Phase of the Fungal Life Cycle Sexual Phase of the Fungal Life Cycle
Video: Smoking Cessation

For a complete list of videos, visit our video library