Is the moon accelerated? A) No, because there is no gravity in ...

[sheilaspns]

Is the moon accelerated?
 
  A) No, because there is no gravity in space.
  B) No, because the gravitational force on it is balanced by the centrifugal force.
  C) Yes, its acceleration is directed forward, along its direction of motion.
  D) Yes, its acceleration is directed inward toward Earth.
  E) Yes, its acceleration is directed outward away from Earth.

Question 2

A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV. What is the threshold frequency for photoelectron production? (h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
 
  A) 6.8  1014 Hz
  B) 2.7  1014 Hz
  C) 7.6  1014 Hz
  D) 8.5  1014 Hz
  E) 9.4  1014 Hz

[josephsuarez]

Answer to Question 1

D

Answer to Question 2

A

[sheilaspns]

Thanks for the timely response, appreciate it

[tkempin]

Great answer, keep it coming