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

Author Question: When a certain metal is illuminated by light, photoelectrons are observed provided that the ... (Read 70 times)

Chelseaamend

  • Hero Member
  • *****
  • Posts: 545
on: Jul 29, 2018
When a certain metal is illuminated by light, photoelectrons are observed provided that the wavelength of the light is less than 669 nm. Which one of the following values is closest to the work function of this metal?
 
  (h = 6.626  10-34 J  s, c = 3.00  108 m/s, 1 eV = 1.60  10-19 J)
  A) 1.9 eV
  B) 2.0 eV
  C) 2.2 eV
  D) 2.3 eV

Question 2

Which of the following industrialized democracies is the least efficient in its use of energy?
 
  A) Great Britain
  B) Japan
  C) Italy
  D) West Germany
  E) United States


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

connor417

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

E


Chelseaamend

  • Member
  • Posts: 545
Reply 2 on: Jul 29, 2018
:D TYSM

diana chang

  • Member
  • Posts: 288
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

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?

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?

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

Mars sketched as observed by Lowell sometime before 1914. (South top) Mars sketched as observed by Lowell sometime before 1914. (South top)
Visible Light Spectrum Visible Light Spectrum
A fluorescent trouble light operates cooler and is safer to use in the shop because it is protected ... A fluorescent trouble light operates cooler and is safer to use in the shop because it is protected ...
Using a bright light makes seeing where the smoke is coming from easier. In this case, smoke was ... Using a bright light makes seeing where the smoke is coming from easier. In this case, smoke was ...
Absorption of light & photopigments Absorption of light & photopigments
The obese (ob) mouse mutant, shown on the left (a normal mouse is on the right), has provided many c The obese (ob) mouse mutant, shown on the left (a normal mouse is on the right), has provided many c
Video: Helper T cell receptors, activation, proliferation, differentiation & action

For a complete list of videos, visit our video library