A succession of 2-m long water waves on a lake goes by a piece of ...

[armygirl]

A succession of 2-m long water waves on a lake goes by a piece of floating cork that bobs up and down one complete cycle each second. What is the speed of the wave?
 
  A) 0.25 m/s
  B) 0.50 m/s
  C) 1.0 m/s
  D) 2 m/s
  E) 4 m/s

Question 2

A photocathode that has a work function of 2.4 eV is illuminated with monochromatic light having photon energy 3.5 eV. What is the wavelength of this light?
 
  (c = 3.00  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
  A) 350 nm
  B) 330 nm
  C) 300 nm
  D) 380 nm
  E) 410 nm

[ryansturges]

Answer to Question 1

Answer: D

Answer to Question 2

A

[armygirl]

Excellent

[billybob123]

Gracias!