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Home Q & A Board Science-Related Homework Help Physics Astronomy
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codytheaggie codytheaggie
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6 years ago
The flow of energy is always from hot to cold and is called ___________.
 
  Fill in the blank(s) with correct word

Question 2

Why does one cycle of lunar phases take 29.53 days even though the Moon orbits Earth in 27.32 days?
 
  What will be an ideal response?

Question 3

______________ will give you information on the surface temperature of the star after you obtain the wavelength of maximum emission from the ________________ spectra.
 
  Fill in the blank(s) with correct word

Question 4

What would you see if you were on the Moon and facing Earth when people on Earth saw a total lunar eclipse?
 
  What will be an ideal response?

Question 5

If a star is moving ____________ from us, then its spectra will be shifted toward ________ wavelengths, producing a redshift.
 
  Fill in the blank(s) with correct word

Question 6

Why is the eclipse year shorter than 365.25 days?
 
  What will be an ideal response?
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Replies
wrote...
#1
6 years ago
Answer to q. 1

heat

Answer to q. 2

A complete cycle of lunar phases takes 29.53 days, the synodic period. The sidereal period, which is the orbital period of the Moon with respect to the stars, is 27.32 days, which is more than 2 days shorter.

Answer to q. 3

Wien's Law, continuous
or
Wien's Law, blackbody

Answer to q. 4

You would see the Sun eclipsed by the Earth, and you would see red light which is due to the refraction of sunlight passing through Earth's atmosphere.

Answer to q. 5

away, longer

Answer to q. 6

The Moon's orbit precesses, because of the gravitational pull of the Sun on the Moon, and the precession slowly changes the direction of the line of nodes. The line turns gradually westward, making one complete rotation in 18.61 years. As a result, the eclipse seasons occur about three weeks earlier each year.
codytheaggie Author
wrote...
#2
6 years ago
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