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Mechanical Prop...

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  • Question 1
    4 / -1

    A soap bubble of radius r is blown up to form a bubble of radius 2r under isothermal condition. If T is the surface tension of soap solution, the energy spent in the blowing, is

  • Question 2
    4 / -1

    The surface tension of a liquid is 5 N/m . If a thin film of the area 0.02 m2 is formed on a loop, then its surface energy will be

  • Question 3
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    The work done in blowing a soap bubble of radius r of the solution of surface tension T will be

  • Question 4
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    Two small drops of mercury, each of radius R, coalesce to form a single large drop. The ratio of the total surface energies and before and after the change is

  • Question 5
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    A drop of mercury of radius 2 mm is split into 8 identical droplets. Find the increase in surface energy. (Surface tension of mercury is 0.465 J/m2)

  • Question 6
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    The surface tension of a liquid at its boiling point

  • Question 7
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    What is ratio of surface energy of 1 small drop and 1 large drop, if 1000 small drops combined to form 1 large drop

  • Question 8
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    One thousand small water drops of equal radii combine to form a big drop. The ratio of final surface energy to the total initial surface energy is

  • Question 9
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    The work done in increasing the size of a soap film from 10 cm × 6 cm to 10 cm × 11 cm is 3 × 10–4 joule. The surface tension of the film is

  • Question 10
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    If σ be the surface tension, the work done in breaking a big drop of radius R in n drops of equal radius is

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