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An umbrella tends to move upward on a windy day because _____. A. buoyancy increases with increasing wind speed B. air gets trapped under the umbrella and pushes it up C. the wind pushes it up D.
a low-pressure area is created on top of the umbrella
An umbrella tends to move upward on a windy day because D. a low-pressure area is created on top of the umbrella.
Expert answered|debnjerry|Points 36419|
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Asked 9/4/2012 10:45:12 AM
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