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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

1 Medium

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Application +4 | -1

A large

He

balloon of volume

1425 \mathrm{~m}^3

is used to lift a pay load of

400 \mathrm{~kg}

. Assume that the balloon maintains constant radius as it rises. How high does it rise?

\rho_0=1.25 \mathrm{~kg} \mathrm{~m}^{-3}

View answer and explanation

Correct option: A

8 \mathrm{~km}

Option A (

8 \mathrm{~km}

) is correct because the balloon rises until its density equals the air density at that height, which is calculated using the given formula.

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d_1

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m_2

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