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Author Question: A corner cube is formed by three plane mirrors perpendicular to one another resulting in a ... (Read 120 times)

bclement10

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on: Jul 28, 2018
A corner cube is formed by three plane mirrors perpendicular to one another resulting in a retroreflector. What is the angle between the directions of an incoming ray of light and of the corresponding outgoing ray of light for this device?
 a. 90
  c. 0
  b. 180
  d. 360

Question 2

A piece of copper of mass 100 g is being drilled through with a 1/2 electric drill. The drill operates at 50.0 W and takes 30.0 s to bore through the copper. If all the energy from the drill heats the copper, find the copper's increase in temperature. (ccopper = 387 J/kg  C.)
 a. 40.6C
  c. 31.0C
  b. 38.8C
  d. 27.3C


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nixon_s

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Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

B


bclement10

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Reply 2 on: Jul 28, 2018
Gracias!

helenmarkerine

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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