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

Author Question: The mean life (time constant) of radon-222 is 5.526 d. If a sample of radon initially contains 6.00 ... (Read 45 times)

panfilo

  • Hero Member
  • *****
  • Posts: 572
on: Jul 29, 2018
The mean life (time constant) of radon-222 is 5.526 d. If a sample of radon initially contains 6.00  108 radon atoms, how many of them are left after 10.0 d?
 
  A) 9.82  107
  B) 7.67  107
  C) 8.34  108
  D) 7.29  108
  E) 8.56  108

Question 2

Suppose that the speed of an electron traveling 1.0 km/s is known to an accuracy of 1 part in 10,000 (that is, within 0.01).
 
  What is the minimum uncertainty in the position of this electron? (melectron = 9.11  10-31 kg, h = 6.626  10-34 J  s)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bdobbins

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

1.2 mm


panfilo

  • Member
  • Posts: 572
Reply 2 on: Jul 29, 2018
Excellent

shailee

  • Member
  • Posts: 392
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

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?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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 highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Changes in Earth's atmospheric carbon dioxide levels over geological time. Changes in Earth's atmospheric carbon dioxide levels over geological time.
The four stages of life expressed in five different primates. The four stages of life expressed in five different primates.
This cover of Life (1925) offered a stereotypical rendering of the new generation: a young couple .. This cover of Life (1925) offered a stereotypical rendering of the new generation: a young couple ..
Sterilization Time Requirements Cont Sterilization Time Requirements Cont
Historical Time Line of Regulatory Acts, Standards, and Organizations Historical Time Line of Regulatory Acts, Standards, and Organizations
Performance of a delayed nonmatching-to-sample trial. Performance of a delayed nonmatching-to-sample trial.
Video: Bulk flow - Factors that influence bulk flow

For a complete list of videos, visit our video library