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A soap bubble is blown to a diameter of ...

A soap bubble is blown to a diameter of 7 cm. if 36960 ergs of work is done in blowing if further find the new radius, if surface tension of the soap solution is 40 dynes/cm.

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Knowledge Check

  • The work done in blowing a soap bubble of 10 cm radius is (Surface tension of the soap solution is 3/100 N/m)

    A
    `75.36xx10^(-4) ` joule
    B
    `37.68xx10^(-4) ` joule
    C
    `150.72xx10^(-4)` joule
    D
    75.36 joule

  • The work done in blowing a soap bubble of radius 0.2 m is (the surface tension of soap solution being 0.06 N/m )

    A
    `192 pi xx10^(-4) J`
    B
    `280pixx10^(-4) j`
    C
    `200 pixx10^(-3)` j
    D
    None of these

  • What will be the work done in blowing a soap bubble of radius 2 cm , the surface tension of the soap solution is 20 dyne/cm at constant temperature ?

    A
    `320 pi ` erg
    B
    ` 640 pi ` erg
    C
    `1240 pi ` erg
    D
    `160 pi ` erg