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

Author Question: A photocathode whose work function is 2.9 eV is illuminated with white light that has a continuous ... (Read 65 times)

ETearle

  • Hero Member
  • *****
  • Posts: 580
on: Jul 29, 2018
A photocathode whose work function is 2.9 eV is illuminated with white light that has a continuous wavelength band from 400 nm to 700 nm.
 
  What is the range of the wavelength band in this white light illumination for which photoelectrons are not produced?(c = 3.00  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J) A) 430 nm to 700 nm
  B) 400 nm to 480 nm
  C) 430 nm to 480 nm
  D) 400 nm to 430 nm
  E) 480 nm to 700 nm

Question 2

A machine part consists of 0.10 kg of iron (of specific heat 470 J/kg  K ) and 0.16 kg of copper (of specific heat 390 J/kg  K). How much heat must be added to the gear to raise its temperature from 18C to 53C?
 
  A) 3800 J B) 4400 J C) 4000 J D) 910 J
Physics ¦ Walker ¦ 5th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Silverbeard98

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly


ETearle

  • Member
  • Posts: 580
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

brbarasa

  • Member
  • Posts: 308
Reply 3 on: Yesterday
Gracias!

« 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?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

A light-coloured cane toad A light-coloured cane toad
Excitation of isolated chlorophyll by light. Excitation of isolated chlorophyll by light.
Human immunodeficiency virus gains entry into helper T cells, uses the cell DNA to replicate, interf Human immunodeficiency virus gains entry into helper T cells, uses the cell DNA to replicate, interf
Schematic of an IgG molecule: Two heavy and 2 light chains are linked together by disulfide bonds. ... Schematic of an IgG molecule: Two heavy and 2 light chains are linked together by disulfide bonds. ...
Ruins of the Anu Ziggurat and White Temple Ruins of the Anu Ziggurat and White Temple
For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ... For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ...
Video: Decubitus Ulcer

For a complete list of videos, visit our video library