Fly in a BottleScience brain teasers require understanding of the physical or biological world and the laws that govern it.
Two identical jars are placed on a scale, each with one fruit fly in it. One fly is flying and the other one is sitting. Which jar weighs more?
HintJust because you can't see it doesn't mean it isn't there.
AnswerNeither; they weigh the same. The only reason the fly is flying is because it flaps its wings to make air push it up. So the fly's weight is converted into air pressure.
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