Multiple Choice
An umbrella tends to jerk upward on a windy day principally because
A) air gets trapped under the umbrella,which warms,and rises.
B) buoyancy increases with increasing wind speed.
C) air pressure is reduced over the curved top surface.
D) all of the above
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q38: An object in a vacuum has no<br>A)buoyant
Q128: A large block of wood and a
Q130: The block that displaces the greatest volume
Q131: What is the approximate density of a
Q132: The buoyant force acting on a 1-ton
Q134: Airplane lift is achieved when air pressure
Q135: Compared to the buoyant force on you
Q136: If you lie on a bed of
Q137: Life jackets help you float because<br>A)the jacket
Q138: When a suction cup sticks to a