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

Author Question: The material used in certain nuclear bombs is 239Pu, which has a half-life of about 20,000 years. ... (Read 83 times)

123654777

  • Hero Member
  • *****
  • Posts: 585
on: Jul 29, 2018
The material used in certain nuclear bombs is 239Pu, which has a half-life of about 20,000 years. How long must we wait for a buried stockpile of this substance to decay to 4.0 of its original 239Pu mass?
 
  A) 93,000 y
  B) 64,000 y
  C) 45,000 y
  D) 800 y

Question 2

What mass of 14C (having a half-life of 5730 years) do you need to provide a decay rate of 280.0 Bq? (1 u = 1.6605  10-27 kg)
 
  A) 1.70  10-12 kg
  B) 5.38  10-19 kg
  C) 3.84  10-20 kg
  D) 8.68  10-13 kg


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tanna.moeller

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: A


123654777

  • Member
  • Posts: 585
Reply 2 on: Jul 29, 2018
Gracias!

CAPTAINAMERICA

  • Member
  • Posts: 325
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Diagram of the life cycle of Plasmodium falciparum, the causative agent of malaria Diagram of the life cycle of Plasmodium falciparum, the causative agent of malaria
Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth
Review of Health and Illness over the Adult Years Review of Health and Illness over the Adult Years
During their elderly years, men and women continue to exhibit aspects of the gender roles that they ... During their elderly years, men and women continue to exhibit aspects of the gender roles that they ...
How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay? How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?
A. Clara Peeters Still Life with Fruit and Flowers A. Clara Peeters Still Life with Fruit and Flowers
Video: Structures that affect circulation - heart and MABP

For a complete list of videos, visit our video library