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 104 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
Great answer, keep it coming :)

atrochim

  • Member
  • Posts: 331
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

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

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

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.
William Morris, Page from a specimen book with sample proof letters, Kelmscott Press. William Morris, Page from a specimen book with sample proof letters, Kelmscott Press.
Sample Exercise Program for Healthy Older Adults Sample Exercise Program for Healthy Older Adults
U.S. Life Expectancy by Year of Birth U.S. Life Expectancy by Year of Birth
Using a vacuum hose and a test light to ground one cylinder at a time on a distributorless ignition ... Using a vacuum hose and a test light to ground one cylinder at a time on a distributorless ignition ...
How to evaluate a function containing the constant k How to evaluate a function containing the constant k
Video: Coronary Heart Disease

For a complete list of videos, visit our video library