Sawaal
2
Q:

A balloon filled with hydrogen will

A) continue going upwards uninterrupted B) reach a particular height and remain floating
C) burst after reaching some height D) reach a particular height and start coming down

Answer:   B) reach a particular height and remain floating



Explanation:

It will stop at a height where the weight of the balloon with contents is equal to the weight of air displaced by it, i.e , when the upthrust is equal to the downthrust. The question of bursting will depend on how much difference of pressure inside and outside , the material of the balloon can withstand. It is assumed the balloon is filled with a lighter than air gas like hydrogen or helium.

Subject: Physics
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