We can essentially rule out the Sun as a cause of global warming over the past few decades because
A) the amount of incoming sunlight has decreased while Earth's average temperature has increased.
B) the amount of light coming from the Sun does not change over time scales of decades.
C) there is no evidence that the Sun can affect climate.
D) the number of sunspots on the Sun varies in an approximately 11-year cycle.
A) the amount of incoming sunlight has decreased while Earth's average temperature has increased.
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In general, sound travels faster through:
a) solids than through gases b) gases than through solids c) gases than through liquids d) empty space than through matter
A jar filled with gas is placed directly in front of a second jar filled with gas. Using a spectroscope to look at one jar through the other you observe dark spectral lines. The jar closest to you contains
A) gas at the same temperature as the other jar. B) the hotter gas. C) gas at very high pressure. D) the cooler gas. E) the exact same gas as the other jar.
Two children are riding on a merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger angular displacement?
A) Child A B) Child B C) They have the same zero angular displacement. D) They have the same non-zero angular displacement. E) There is not enough information given to answer the question.