Why does the closed top of a convertible bulge when the car is riding along a highway?
Why does the closed top of a convertible bulge when the car is traveling along a highway?
a) The air pressure outside the car is greater than the air pressure inside.
b) The volume of air inside the car increases as the car moves.
c) Air is pushed into the front part of the roof, causing the back part to lift.
d) The air pressure inside the car is higher than the pressure outside.
3 Answers
d). It is the Bernoulli principle in action; the air pressure in the flow over the top of the roof is greater than the pressure of the stagnant air under the roof. Purists will argue that is greatly oversimplified and will offer explanations that boil down to the same thing, but 99% of us recognize it as Bernoulli.
It’s D. What ever test you’re taking is stupid and will not have a thing to do with you learning to repair cars! A balloon blows up because of what? a) too much vacuum in the balloon. b) you just blew air into the balloon. Stupid question isn’t it?!!
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