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Reducing friction by an air stream
Cut out a disc of cardboard about 10 cm in diameter. With a red-hot pin, burn a hole by the centre. Saw a small cotton reel in half and glue the unique end of one half over the middle of the disc. Search a piece of bamboo or some other tube which just fits the hole in the reel. Push this into the neck of a small balloon, using cotton or a rubber band to protected the joint.
Friction by an air stream
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Q. Select the correct trajectory of the ball after it breaks? A ball is being whirled on a string. At the instant shown in figure, the string breaks. choose the correct traject
Ask quebackground displacement current and its applications stion #Minimum 100 words accepted#
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