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Physics, 03.12.2020 17:00 hihihi129473838

You will need the following items: a rope about 10 to 20 meters long, a meter or yard stick, a watch that records seconds, and a helper. Tie one end of the rope to a doorknob or other secure object at about waist height. Have your helper take one end of the rope and whip it up and down, while you watch.

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You will need the following items: a rope about 10 to 20 meters long, a meter or yard stick, a watch...

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