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 88 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 :)

raili21

  • Member
  • Posts: 324
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Phylogeny of the three domains of life Phylogeny of the three domains of life
1–12 Elements essential to animal life and health 1–12 Elements essential to animal life and health
Students rated their grandparents on a scale from 1 to 4 based on emotional closeness, time spent ... Students rated their grandparents on a scale from 1 to 4 based on emotional closeness, time spent ...
Typical life cycle of the tick family. Typical life cycle of the tick family.
A new drug development time line with the four phases of drug approval. A new drug development time line with the four phases of drug approval.
Simplified view of retrovirus life cycle Simplified view of retrovirus life cycle
Video: Protein catabolism (Krebs cycle) and Protein anabolism (protein synthesis)

For a complete list of videos, visit our video library