« previous next »

Author Question: A metal has a work function of 4.50 eV. Find the maximum kinetic energy of the photoelectrons if ... (Read 115 times)

khang

  • Hero Member
  • *****
  • Posts: 569
on: Jul 29, 2018
A metal has a work function of 4.50 eV.
 
  Find the maximum kinetic energy of the photoelectrons if light of wavelength 250 nm shines on the metal. (1 eV = 1.60  10-19 J, c = 3.00  108 m/s, h = 6.626  10-34 J  s)
  A) 0.53 eV B) 0.00 eV C) 0.37 eV D) 0.47 eV

Question 2

A charged particle is observed traveling in a circular path of radius R in a uniform magnetic field. If the particle were traveling twice as fast, the radius of the circular path would be
 
  A) R/2. B) 8R. C) R/4. D) 4R. E) 2R.


nguyenhoanhat

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

khang

  • Hero Member
  • *****
  • Posts: 569
Reply #2 on: Jul 29, 2018
Thanks


nguyenhoanhat

  • Sr. Member
  • ****
  • Posts: 332
Reply #3 on: Jul 29, 2018
Welcome :)


« previous next »
 

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Activation energy of a chemical reaction Activation energy of a chemical reaction
Basic energy of a human life Basic energy of a human life
Decapods, from Ernst Haeckel's 1904 work Kunstformen der Natur Decapods, from Ernst Haeckel's 1904 work Kunstformen der Natur
How to find the first and second differences for any table of values How to find the first and second differences for any table of values
How to sketch a cubic function using transformations How to sketch a cubic function using transformations
Sketch the graph using the tables providing. Determine if each function is continuous or ... Sketch the graph using the tables providing. Determine if each function is continuous or ...
Video: Pericarditis

For a complete list of videos, visit our video library