Why ate screws preferred to nails in holding the two pieces
of wood ?
Answer / sanju
Because in the round turns of the screw, the friction is
grater than in the plane surface.
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What sound waves travel from air to water the frequency remains?
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Describe the Sphygmanometer?
Explain what is optical medium?
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I observed this question to be asked in many exams - We cannot move even a finger without disturbing all the stars?Explain it.
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