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 30 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
:D TYSM

essyface1

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Morgan's crosses of red-eyed and white-eyed Drosophila Morgan's crosses of red-eyed and white-eyed Drosophila
As some groups do ethnic work, they produce a mythical long-lost heritage, as in this photo of ... As some groups do ethnic work, they produce a mythical long-lost heritage, as in this photo of ...
How do men who work in traditionally feminine nurturng jobs and women who work in jobs that give ... How do men who work in traditionally feminine nurturng jobs and women who work in jobs that give ...
How to find the average value of a function How to find the average value of a function
Continuous vs. Saltatory Conduction Continuous vs. Saltatory Conduction
Structure and function of human teeth. Structure and function of human teeth.
Video: Neural regulation of blood pressure - baroreceptor and chemoreceptor reflexes

For a complete list of videos, visit our video library