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Author Question: Is the moon accelerated? A) No, because there is no gravity in space. B) No, because the ... (Read 26 times)

sheilaspns

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on: Jul 29, 2018
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


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josephsuarez

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Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

A


sheilaspns

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Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

nguyenhoanhat

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Reply 3 on: Yesterday
:D TYSM

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