This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A certain crystal has an interatomic spacing of 0.142 nm. If a beam of electrons moving with a speed ... (Read 74 times)

karen

  • Hero Member
  • *****
  • Posts: 537
on: Jul 29, 2018
A certain crystal has an interatomic spacing of 0.142 nm. If a beam of electrons moving with a speed of 1400 m/s is diffracted from this crystal, what is the de Broglie wavelength of the electron?
 
  A) 420 nm
  B) 130 nm
  C) 260 nm
  D) 502 nm
  E) 520 nm

Question 2

The length of a certain wire is doubled and at the same time its radius is tripled. What is the change in the resistance of this wire?
 
  A) It stays the same.
  B) It is reduced by a factor of 4.5.
  C) It is doubled.
  D) It is tripled.
  E) It is quadrupled.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cupcake16

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

B


karen

  • Member
  • Posts: 537
Reply 2 on: Jul 29, 2018
Excellent

6ana001

  • Member
  • Posts: 311
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Rotation Rotation–Moving a body part around a central axis. Rotation Rotation–Moving a body part around a central axis.
Pupil assessment; B, moving penlight directly in front of pupil. Pupil assessment; B, moving penlight directly in front of pupil.
Covalent bonds form by the sharing of electrons Covalent bonds form by the sharing of electrons
J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway. J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway.
A beam-type torque wrench that displays the torque reading on the face of the dial. The beam display ... A beam-type torque wrench that displays the torque reading on the face of the dial. The beam display ...
How to solve a distance, time, speed problem using linear algebra How to solve a distance, time, speed problem using linear algebra
Video: The life cycle of protein

For a complete list of videos, visit our video library