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Q. When a surfer rides an ocean wave on her surfboard she is actually riding on. a. a crest that is toppling over. b. a trough of the wave. c. The rest position of the wave. d. A region of rarefaction.

Q. A certain elevator cab has a total run of 208 m and a maximum speed is 314 m/min, and it accelerates from rest and then back to rest at 1.21m/s2. (a) How far does cab move while accelerating to full speed from rest? (b) How long does it take to make nonstop 208 m run, starting and ending at rest?

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