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Author Question: The energy emitted by the Sun comes from chemical reactions. a. True b. False Indicate whether ... (Read 86 times)

ghost!

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The energy emitted by the Sun comes from chemical reactions.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

How can tidal forces affect the rotation of celestial bodies and their orbital motion? Hint: Consider Earth and the Moon.
 
  What will be an ideal response?



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snackralk

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Answer to Question 1

False

Answer to Question 2

Tidal forces affect orbital motion. For example, Earth rotates eastward, and friction with the ocean bed drags the tidal bulges slightly eastward out of a direct Earth-Moon line. These tidal bulges are massive, and their gravitational field pulls the Moon forward in its orbit. As a result, the Moon's orbit is growing larger by about 3.8 cm a year. Earth's gravitation exerts tidal forces on the Moon, and friction within the flexing rock has slowed the Moon's rotation to the point that it now keeps the same face toward Earth.





 

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