« 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 44 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?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

The Speed of Light Is Constant The Speed of Light Is Constant
Although average brain size increases gradually though time in H. erectus, individuals with small br Although average brain size increases gradually though time in H. erectus, individuals with small br
Environmental Systems in Space and Time Environmental Systems in Space and Time
The Geologic Time Scale The Geologic Time Scale
Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia). Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia).
Chlamydomonas Life Cycle Chlamydomonas Life Cycle
Video: baroreceptors

For a complete list of videos, visit our video library