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Author Question: A radar pulse returns 2.0 10-4 seconds after it is sent out, having been reflected by an object. ... (Read 79 times)

jon_i

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on: Jul 28, 2018
A radar pulse returns 2.0  10-4 seconds after it is sent out, having been reflected by an object. What is the distance between the radar antenna and the object? (c = 3.00  108 m/s)
 a. 3.0  104 m
  c. 9.0  104 m
  b. 4.5  104 m
  d. 6.0  104 m

Question 2

A buzzer with frequency f0 is thrown straight upwards. On the buzzer's trip down, what is the frequency behavior heard by an observer below?
 a. The frequency heard is still f0.
  b. The frequency is a constant one greater than f0.
  c. The frequency is an increasing one greater than f0.
  d. The frequency is a decreasing on less than f0.


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kusterl

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

A

Answer to Question 2

C


jon_i

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Reply #2 on: Jul 28, 2018
Thank you!


kusterl

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Reply #3 on: Jul 28, 2018
Always glad to help...


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