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Author Question: The intensity of light from the Sun is 1.3 kW/m2 at the distance of the Earth. The Earth's radius is ... (Read 90 times)

fagboi

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on: Jul 28, 2018
The intensity of light from the Sun is 1.3 kW/m2 at the distance of the Earth. The Earth's radius is 6.4  106 m. If all the sunlight that hits the Earth were absorbed, what would be the magnitude of the resulting force on the Earth?
 a. 0.0087 N
  c. 5.6  108 N
  b. 1.8  108 N
  d. 87 N

Question 2

A vibrating guitar string emits a tone simultaneously with one from a 500-Hz tuning fork. If a beat frequency of 4 Hz results, what is the frequency of vibration of the string?
 a. 2500 Hz
  c. 504 Hz
  b. 496 Hz
  d. Either choice B or C is valid.


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gstein359

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

C

Answer to Question 2

D


fagboi

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

diana chang

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Reply 3 on: Yesterday
Excellent

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