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Author Question: A 3 kg mass is positioned at (0, 8), and a 1 kg mass is positioned at (12, 0). What are the ... (Read 45 times)

Pineappleeh

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on: Jul 27, 2018
A 3 kg mass is positioned at (0, 8), and a 1 kg mass is positioned at (12, 0). What are the coordinates of a 4 kg mass which will result in the center of mass of the system of three masses being located at the origin (0, 0)?
 
  A) (-3, -6)
  B) (-6, -3)
  C) (3, 6)
  D) (-12, -8)

Question 2

When a light wave enters into a medium of different optical density
 
  A) its speed and frequency change.
  B) its speed and wavelength change.
  C) its frequency and wavelength change.
  D) its speed, frequency, and wavelength change.


flexer1n1

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


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