The evidence for present-day global warming include
A) extreme weather—heat waves and droughts.
B) melting of Arctic and Antarctic sea ice and continental ice fields and glaciers.
C) severe winter storms, and increased downpours and flooding.
D) all of the above.
Answer: D
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Suppose you are preparing an actual-size trajectory diagram of a freely falling object. The time interval between positions is 0.02 s. How long should you draw the acceleration arrows on your diagram?
A. 9.8 m B. 0.20 m C. 0.04 m D. 3.9 cm E. 0.39 cm F. Other (specify
Compared to Jupiter, the motions observed in Saturn's atmosphere are:
A) faster with fewer zone-belt alternations. B) slower with fewer zone-belt alternations. C) faster with more zone-belt alternations. D) slower with more zone-belt alterations. E) nearly identical.
Although the atmospheres of Uranus and Neptune are very similar, the atmosphere of Neptune contains more:
A) Hydrogen. B) Helium. C) Methane. D) Ammonia. E) Nitrogen.
What is the spectral type of the Sun?
A) K9 B) G2 C) F7 D) A2