When a certain metal is illuminated by light, photoelectrons are ...

[Chelseaamend]

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

[connor417]

Answer to Question 1

A

Answer to Question 2

E

[Chelseaamend]

Thanks for the timely response, appreciate it

[dantucker]

Great answer, keep it coming