Tireless dancers. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Tireless dancers. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

If you manage to get camphor and ether, you can make another very interesting toy.

Through the circle cut off from the cork, pass two thin needles crosswise. If there is no cork, Styrofoam, a hard and very light porous plastic, is fine. At the ends of the needles, strengthen four small cork plates. Glue camphor crystals to the plates as shown in the drawing. You can glue it with sealing wax. Drop sealing wax on the cork, heat it over a candle or match and put a camphor crystal on it with tweezers. And you can glue it with BF-2 glue.

Here, too, it is very important that there is not the slightest trace of fat. Work with clean hands. Take the finished turntable with tweezers and rinse in the air. After that, in no case do not take it with your hands, but only with tweezers. Wash the bowl in which the spinner will float in hot water with soda or washing powder.

Tireless dancers

Put the spinner on the water. It should start spinning fast. If everything is in order, cut out a dancing couple from thin (writing) paper and glue it on a cork circle. These will be the most tireless dancers in the world. They can spin for three days without stopping, until the camphor crystals become very small.

Invite a friend to guess what force makes these dancers whirl. It is unlikely that he will guess that the force of reaction works here too!

Author: Galpershtein L.Ya.

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