An Umbrella Tends to Move Upwards on a Windy Day

question 28

Multiple Choice

An umbrella tends to move upwards on a windy day principally because

• A)air gets trapped under the umbrella,warms,and rises.
• B)buoyancy increases with increasing wind speed.
• C)air pressure is reduced over the curved top surface.
• D)all of these

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Definitions:

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DE-style Equations

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The speed at which a drug or substance is administered intravenously, typically measured in ml/hr (milliliters per hour).

Meperidine

A synthetic opioid analgesic drug, used to treat moderate to severe pain.