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11. A person blows into open-end of a long pipe. As a result, a high-pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe, (A) a high-pressure pulse starts traveling up the pipe, if t ...
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A vertical pencil of rays comes from the bottom of a tank filled with a liquid.When it is accelerated with an acceleration of 7.5 m/s2 , the ray is seen to be totally reflected by liquid surface.What is the minimum possible r ...
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An ammeter has resistance R0 and range I. What resistance should be connected in parallel with it to increase the range to nI ?? ...
