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Q. An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source?

Q. A ball thrown vertically upward is caught by the thrower after 8.10s

(a) find the initial velocity of the ball

(b) find the maximum height it reaches

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Category:- Physics
Reference No.:- M9280195

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