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

Author Question: An electron has the same de Broglie wavelength as a 1.8 eV photon. The speed of the electron is ... (Read 197 times)

TFauchery

  • Hero Member
  • *****
  • Posts: 500
on: Jul 29, 2018
An electron has the same de Broglie wavelength as a 1.8 eV photon. The speed of the electron is closest to:
 
  A) 1,100 m/s
  B) 980 m/s
  C) 910 m/s
  D) 840 m/s
  E) 770 m/s

Question 2

A Carnot engine operates between reservoirs at 550K and 300K, discarding 1500 J of heat in each cycle.
  (a) What is the engine's efficiency?
  (b) How much heat is supplied to the engine by the hot reservoir in each cycle?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fauacakatahaias

  • Sr. Member
  • ****
  • Posts: 353
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

(a) 45.5 (b) 2750 J


TFauchery

  • Hero Member
  • *****
  • Posts: 500
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


fauacakatahaias

  • Sr. Member
  • ****
  • Posts: 353
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Scorpions, Spiders and Sharks: Electron-Microscope Images Scorpions, Spiders and Sharks: Electron-Microscope Images
Stereo Image taken by NASA STEREO Probes launched in 2006; utilizing two Spacecrafts to image the Su Stereo Image taken by NASA STEREO Probes launched in 2006; utilizing two Spacecrafts to image the Su
The Speed of Light Is Constant The Speed of Light Is Constant
Electron micrograph of lysosomes. Electron micrograph of lysosomes.
Respiratory electron carriers in the mitochondrion Respiratory electron carriers in the mitochondrion
An Enzyme in Action Enzymes speed up reactions in your body An Enzyme in Action Enzymes speed up reactions in your body
Video: Oral Hygiene & Braces Animation

For a complete list of videos, visit our video library