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Author Question: A fused combination of a diverging and converging lens pair, each made from a different index of ... (Read 144 times)

magmichele12

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on: Jul 28, 2018
A fused combination of a diverging and converging lens pair, each made from a different index of refraction glass, is used to reduce the occurrence of which of the following effects?
 a. mirages
  c. chromatic aberration
  b. light scattering
  d. spherical aberration

Question 2

The mass of a hot-air balloon and its cargo (not including the air inside) is 250 kg. The air outside is at a temperature of 10C and a pressure of 1 atm = 105 N/m2 . The volume of the balloon is 400 m3 . Which temperature below of the air in the balloon will allow the balloon to just lift off? (Air density at 10C is 1.25 kg/m3.)
 a. 37C
  c. 99C
  b. 293C
  d. 200C


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Sierray

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

C

Answer to Question 2

B


magmichele12

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


Sierray

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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