If a 20-kg object dropped in air has a terminal speed of 60 m/s, what was its acceleration at 30 m/s?
a. 9.80 m/s2
b. 7.35 m/s2
c. 4.90 m/s2
d. 2.45 m/s2
e. More information is needed to answer this question.
B
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A. up B. down C. to your left D. to your right E. forwards
At which lunar phase(s) are tides most pronounced (e.g., the highest high tides)?
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What are the most common type of meteorite?
a. chondrites
b. chondrules
c. iron meteorites
d. carbonaceous chondrites
e. calcium-rich carbonites
The Higgs field, if it is discovered, is expected to interact with particles in such a way as to give those particles
A) the ability to exert forces. B) electric charge. C) good looks. D) rest mass. E) physical existence.