Why is a 1 solar-mass red giant more luminous than a 1 solar-mass main sequence star?
A) Fusion reactions are producing energy at a greater rate in the red giant.
B) The red giant's surface is hotter.
C) The red giant is more massive.
D) The red giant has a hotter core.
A
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What is meant by an ideal or perfect gas?
What will be an ideal response?
In a spectroscopic binary, if a pair shows a combined set of lines tonight, but a maximum split two nights later, its orbital period must be
A) one day. B) two days. C) four days. D) eight days. E) twelve days.
As you know, the earth has an orbital period of 1.0 year at an orbital radius of 1.0 AU (astronomical unit, the average distance between the earth and the sun)
If a new "minor planet" were to be found in a circular orbit with radius 13 AU, what would be its orbital period?
When you look into a pool of water, the depth looks less than it actually is because of __________
Fill in the blank(s) with correct word