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Q. The ordinary and maximum tolerance limit of sound by human being is
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Q. A doppler effect occurs when a source of sound moves
Q. In a nuclear reactor, one of the following is used as a fuel.
Q. Hydraulic brakes work on the principle of
Q. Magnetism at the centre of a bar magnet is
Q. The height of a geo-stationary satellite from the Earth's surface is approximately :
Q. For a ray of light to suffer total internal reflection it has to pass from
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