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question_answer1) There is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is pierced inside the loop and the thread becomes a circular loop of radius R. If the surface tension of the loop be T, then what will be the tension in the thread [RPET 1996]
question_answer2) A large number of water drops each of radius r combine to have a drop of radius R. If the surface tension is T and the mechanical equivalent of heat is J, then the rise in temperature will be [MP PET 1994; DPMT 2002]
question_answer3) An air bubble in a water tank rises from the bottom to the top. Which of the following statements are true [Roorkee 2000]
question_answer4) In a surface tension experiment with a capillary tube water rises upto 0.1 m. If the same experiment is repeated on an artificial satellite, which is revolving around the earth, water will rise in the capillary tube upto a height of [Roorkee 1992]
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