Q550
A balloon filled with hydrogen will
A.
Continue going upwards uninterrupted
B.
Reach a particular height and remain floating
AnswerC.
Burst after reaching some height
D.
Reach a particular height and start coming down
Answer: Option B
Solution
Answer: Option B
Solution:
A balloon filled with the hydrogen stops rising after it has attained a certain height in the sky. This is because as height increases, the density of air decreases resulting in a decrease of buoyant force.