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

Author Question: The material used in certain nuclear bombs is 239Pu, which has a half-life of about 20,000 years. ... (Read 76 times)

123654777

  • Hero Member
  • *****
  • Posts: 585
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
Answer to Question 1

Answer: A

Answer to Question 2

Answer: A




123654777

  • Member
  • Posts: 585
Reply 2 on: Jul 29, 2018
:D TYSM


debra928

  • Member
  • Posts: 342
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

For a complete list of videos, visit our video library