The greenhouse effect produces excess heat in a planet's atmosphere by
a. trapping infrared radiation from escaping into space.
b. clouds blocking the surface from receiving any infrared radiation.
c. preventing light gases from escaping into space.
d. trapping ultraviolet light in the upper atmosphere of the planet.
a
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The density of material at the center of a neutron star is approximately 1.00 × 1018 kg/m3. What is the mass of a cube of this material that is on each side. (One micron is equal to 1.00 × 10-6 m.)
A) 5.45 kg B) 4.74 kg C) 6.16 kg D) 6.70 kg
In the aluminum-nickel phase diagram in Figure 5.15, what is the reaction type that leads to the formation of Al3Ni at 854°C? _____________
Fill in the blank(s) with the appropriate word(s).
A sound source is placed in the center of a very wide and long room that has a low ceiling. Assume that the ceiling and floor are constructed of a material that absorbs the sound completely. In this situation, how would the intensity of the sound heard vary if a person moves from a distance of 10 meters from the source to a distance of 20 meters from the source?
1.The sound would have about ¼ the intensity 20 m from the source that it has 10 m from the source. 2.The sound would have about ½ the intensity 20 m from the source that it has 10 m from the source. 3.The sound would have about the same intensity 20 m from the source that it has 10 m from the source. 4.The sound would have about twice the intensity 20 m from the source that it has 10 m from the source.
Explain the significance of the Lyman Alpha Forest in studying the universe on the grandest of scales
What will be an ideal response?