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 79 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
Great answer, keep it coming :)

alexanderhamilton

  • Member
  • Posts: 334
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

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?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Testing the reducing atmosphere hypothesis for the origin of life - the Miller and Urey experiment. Testing the reducing atmosphere hypothesis for the origin of life - the Miller and Urey experiment.
Classification of life histories based on juvenile survival, fecundity, and age at reproductive matu Classification of life histories based on juvenile survival, fecundity, and age at reproductive matu
Types of paralysis: (A) Quadriplegia is complete or partial paralysis of the upper extremities and c Types of paralysis: (A) Quadriplegia is complete or partial paralysis of the upper extremities and c
Clinical Embryology Training:Promising career for Life science Graduates Clinical Embryology Training:Promising career for Life science Graduates
Still Life, House of The Stags (Cervi) Still Life, House of The Stags (Cervi)
A portfolio earned -13%, 18%, 5%, 24%, and -5% in five successive years. What was the ... A portfolio earned -13%, 18%, 5%, 24%, and -5% in five successive years. What was the ...
Video: The Hypothalamus: The Body's Thermostat (Human Thermostat)

For a complete list of videos, visit our video library