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Author Question: What is the result, expressed to the proper number of significant figures, of adding 23.4 to 91.237 ... (Read 84 times)

cabate

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  • Posts: 537
on: Jul 29, 2018
What is the result, expressed to the proper number of significant figures, of adding 23.4 to 91.237 and then subtracting 23.4?
 
  A) 91.237
  B) 91.2
  C) 91.3
  D) 91.0
  E) 91

Question 2

A scuba diver is 1.2 m beneath the surface of a still pond of water.
 
  At what angle relative to the normal at the surface must the diver shine a beam of light toward the surface in order for a person on a distant bank to be able to see it? The index of refraction for water is 1.33. A) 41
  B) 48
  C) 59
  D) 90
  E) 0
Physics ¦ Walker ¦ 5th Edition
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akemokai

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

B

Answer to Question 2

B


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