Home
Class 11
PHYSICS
A balloon filled with helium does not ri...

A balloon filled with helium does not rise in air indefinitely but halts after a certain height. (Neglect winds). Explain

Text Solution

Verified by Experts

in the beginning the balloon filled with helium rieses in air because weight of the air displaced by balloon is more than the weight of the balloon and helium gas filled inside balloon. We know that the density of air and the value of ac celeration due to gravity decreases with height. due to it, the weight of air decrease at greater height. The balloon halts at such a height where the weight of the air displaced just equal to the weight of helium gas and the balloon.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Advanced problems for competitions|21 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise NCERT Questions|73 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Solved Examples|159 Videos

  • PHYSICAL WORLD AND MEASUREMENT

    PRADEEP|Exercise Competiton Focus Jee Medical Entrance|18 Videos

  • RAY OPTICS

    PRADEEP|Exercise Problem For Practice(a)|25 Videos

Similar Questions

Explore conceptually related problems

A balloon filled with hydrogen gas floats in air . Explain why ?

A baloon filled with helium rises against gravity increasing its potential energy. The speed of the baloon also increases as it rises. How do you reconcile this with the law of conservation of mechanical energy ? You can neglect viscous drag of air and assume that density of air is constant.

Knowledge Check

  • Assertion : A balloon filled with hydrogen stops rising after it has attained a certain height in the sky . Reason : As height increases, density of air decreases resulting in increase of buoyant force.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion .
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false .

  • Statement-1: A gas filled balloon stops rising after it has attained a certain height in the sky. Statement-2: At the highest point the density of air is such that the buoyant force on the balloon just equals its weight.

    A
    Statement-1, is true, Statement-2 is true, Statement-2 is correct explanation for statement-1
    B
    Statement-1 is true, statement-2 is true, statement-2 is NOT a correct explantion for statement-1
    C
    statement-1 is true, statement-2 is false
    D
    statement-1 is false statement-2 is true

  • Statement I: A hydrogen-filled balloon stops rising after it has attained a certain height in the sky. Statement II: The atmospheric pressure decreases with height and becomes zero when the maximum height is attained.

    A
    Statement I is true, statement II is true and Statement II is a correct explanation for Statement I.
    B
    Statement I is true, Statement II is true and Statement II is NOT the correct explanation for Statement I.
    C
    Statement I is true, Statement II is false.
    D
    Statement I is false, Statement II is true.

    • Similar Questions

    Explore conceptually related problems

    Why gas filled balloons rise up, only to a certain height ?

    A balloon filled with helium rises to a certain height at which it gets fully inflated to a volume of 10^(5) litres. If at this altitude, temperature and atmospheric pressure are 268 K and 2xx10^(-3) atm respectively, what weight of helium will be required to fully inflate the balloon ?

    A balloon filled with helium rises to a certain height at which it gets fully inflated to a volume of 1 xx 10^(5) litres. If at this altitude temperature and atmospheric pressure is 268 K and 2 xx 10^(-3) atm respectively, what weight of helium will be required to fully inflate the balloon ?

    A balloon filled with helium or hot air can float in the atmosphere. A balloon filled with air from your lungs falls to the ground when it is released. Why do these balloons behave differently?

    Why gas filled balloons rise up, only to a certain height?

    Home
    Profile