« previous next »

Author Question: The mean life (time constant) of rubidium-86 is 26.8 d. What is its half-life? What will be an ... (Read 34 times)

Frost2351

  • Hero Member
  • *****
  • Posts: 557
on: Jul 29, 2018
The mean life (time constant) of rubidium-86 is 26.8 d. What is its half-life?
 
  What will be an ideal response?

Question 2

A tiny dust particle of mass 8.50 g is being observed under a microscope. Its position is determined to be within a space of 0.0060 mm. (h = 6.626  10-34 J  s)
 
  (a) Find the uncertainty in its speed implied by the uncertainty in its position.
  (b) Assuming the dust particle is moving at the speed in part (a), how many years would it take for the particle to move 1.0 mm?


tuwy

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 29, 2018
Answer to Question 1

18.6 d

Answer to Question 2

(a) 2.1  10-21 m/s (b) 1.5  1010 y


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Life Life
Time dependence of the rates of a chemical reaction Time dependence of the rates of a chemical reaction
Fern life cycle Fern life cycle
Emanuel Leutze’s Washington Crossing the Delaware (1851) is riddled with historical inaccuracies, mo Emanuel Leutze’s Washington Crossing the Delaware (1851) is riddled with historical inaccuracies, mo
Signs of Pregnancy: Preggo Life Signs of Pregnancy: Preggo Life
Nils Hoffmann feat. Dustin Tebbutt - Next Life Nils Hoffmann feat. Dustin Tebbutt - Next Life
Video: Introduction to filtration - filtrate formation and composition

For a complete list of videos, visit our video library