Cold damp weather along the eastern coast of the United States is most likely caused by a
A) continental tropical air mass.
B) continental polar air mass.
C) maritime tropical air mass.
D) maritime polar air mass.
Answer: D
Physics & Space Science
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m/s in a magnetic field of 30 mT. What is the magnetic force on the proton?
A. 
B. 
C. 0.0
D. 
E. More information is needed.
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64,200,000,000 is equal to
a. 6.42 × 10^7. b. 6.42 × 10^?7. c. 6.42 × 10^10. d. 6.42 × 10^?10. e. 1.0 × 10^64.2.
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In the Milky Way, the most abundant gas in emission nebulae is ____.
A. Helium B. Hydrogen C. Neon D. Krypton
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Suppose a ball is thrown straight up and there is no air. What is its acceleration just before it reaches its highest point?
A) zero B) slightly less than g C) exactly g D) slightly greater than g
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