Radiant energy from the Sun reaches the Earth at a rate of 
When 30.0% of the radiant energy is reflected and 70.0% absorbed, the average temperature of the Earth's atmosphere is 253 K or -20.0
If the atmosphere reflected 40.0% and absorbed 60.0% of the solar radiant energy, then what is the average temperature of the Earth's atmosphere?
A. -25.2
B. -27.0
C. -27.5
D. -28.5
E. -29.6
E. -29.6
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The Milky Way galaxy contains about ________ stars
Fill in the blank(s) with correct word
Neptune and Uranus have a bluish tint because
A) at their distances, the Sun appears blue, the red absorbed by dust in the ecliptic. B) they are far away and distance makes objects appear bluish. C) their atmospheres contain methane, which absorbs red light. D) their atmospheres contain hydrogen and helium. E) ammonia ice reflects blue light better than any other color.
A) If you are on the near side of the Moon, the side facing Earth, describe what you would see of Earth over one lunar cycle. b) If you are on the far side of the Moon, the side facing away from Earth, describe what you would see of Earth over one lunar cycle
What will be an ideal response?
The air that you breathe doesn't emit visible light indicates that most of the electrons of its atoms are
A) in the ground state. B) excited to metastable states. C) relatively cool. D) electrically neutral. E) relatively far apart.