« previous next »

Author Question: An electron has been accelerated by a potential difference of 100 V. If its position is known to ... (Read 64 times)

biggirl4568

  • Hero Member
  • *****
  • Posts: 551
on: Jul 28, 2018
An electron has been accelerated by a potential difference of 100 V. If its position is known to have an uncertainty of 1 nm, what is the percent uncertainty (Dp/p  100) of the electron?
 a. 1
  b. 2
  c. 10
  d. >>10
  e. 5

Question 2

Assume the Heisenberg uncertainty principle can take the form DEDt  h/4B. How accurate can the position of an electron be made if its speed is 5  106 m/s and if the uncertainty in its energy is 10 eV?
 a. 7.7  10-18 m
  b. 1.3  10-23 m
  c. 6.2  10-15 m
  d. 1.6  10-10 m
  e. 1.2  10-9 m


sarajane1989

  • Sr. Member
  • ****
  • Posts: 296
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Homologous proteins in the electron transport chains of mitochondria and chloroplasts Homologous proteins in the electron transport chains of mitochondria and chloroplasts
Insects Under the Electron Microscope Insects Under the Electron Microscope
The anatomical position: standing erect, gazing straight ahead, arms down at sides, palms facing for The anatomical position: standing erect, gazing straight ahead, arms down at sides, palms facing for
Membrane potential of a cell freely permeable to sodium only. Membrane potential of a cell freely permeable to sodium only.
Gating of sodium and potassium channels during an action potential. Gating of sodium and potassium channels during an action potential.
What is the minimum uncertainty in its position? What is the minimum uncertainty in its position?
Video: Hierarchical Sequencing Method - Sequence Tagged Sites

For a complete list of videos, visit our video library