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 34 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
Wow, this really help

sailorcrescent

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Gorillas moving in habitat Gorillas moving in habitat
Snow crystal Snow crystal
Direct pressure to deep rotator muscles using the elbow. Use the elbow tip to apply pressure moving ... Direct pressure to deep rotator muscles using the elbow. Use the elbow tip to apply pressure moving ...
Crystal structure of telomerase catalytic subunit from the red flour beetle Crystal structure of telomerase catalytic subunit from the red flour beetle
If a meteor (148 kg) is moving with a velocity of 112 m/s , and breaks into two parts, where ... If a meteor (148 kg) is moving with a velocity of 112 m/s , and breaks into two parts, where ...
A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ... A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ...
Video: Acid-base imbalances - respiratory acidosis and alkalosis

For a complete list of videos, visit our video library