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Author Question: Glass panes are opaque to a certain type of radiation, which can cause sunburn. What type of ... (Read 40 times)

sc00by25

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on: Jul 28, 2018
Glass panes are opaque to a certain type of radiation, which can cause sunburn. What type of radiation is it? This radiation is important in ozone layer reactions.
 a. gamma
  c. X-ray
  b. ultraviolet
  d. microwave

Question 2

You stand by the railroad tracks as a train passes by. You hear a 950-Hz frequency when the train approaches, which changes to 820 Hz as it goes away. How fast is the train moving? The speed of sound in air is 340 m/s.
 a. 14.0 m/s
  c. 25.0 m/s
  b. 20.0 m/s
  d. 37.8 m/s


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ErinKing

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

B

Answer to Question 2

C


sc00by25

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Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

yeungji

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Reply 3 on: Yesterday
Excellent

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