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Author Question: As an electromagnetic wave travels through free space, its speed can be increased by: a. increasing ... (Read 73 times)

joe

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on: Jul 28, 2018
As an electromagnetic wave travels through free space, its speed can be increased by:
 a. increasing its frequency.
  b. increasing its energy only.
  c. increasing both its energy and momentum.
  d. None of the above will increase its speed.

Question 2

Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 540 Hz. What is the frequency heard by the driver of the lead car? (vsound = 340 m/s)
 a. 463 Hz
  c. 579 Hz
  b. 540 Hz
  d. 500 Hz


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reversalruiz

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

D

Answer to Question 2

B


joe

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Reply 2 on: Jul 28, 2018
Gracias!

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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