Question

explain a balloon filled with hydrogen rises in air​

Answer 1

Answer:

$\huge\color{green}{ \colorbox{pink}{\colorbox{white} {Your Answer}}}$

A balloon filled with hydrogen rises to a certain height as it displaces more weight of air than weigh the of the balloon but as it rises higher density of air decreases there and upthrust becomes less and ultimately upthrust becomes equal to the weight of balloon and balloon stops rising further.

Answer 2

• Hydrogen gas is less dense than air. As a result, a hydrogen-filled balloon rises because it is lighter than air.
• A hydrogen-filled balloon rises to a certain height because it displaces more air than it weighs, but as it climbs, the density of air drops, and up thrust reduces, until up thrust equals the weight of the balloon, at which point the balloon stops ascending.