Pinwheel on a pin. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Pinwheel on a pin. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

For experiments with a cunning snake, you need a hot stove or a hot radiator. Well, what to do in the summer?

You can, of course, hold the snake over a kitchen stove, over a kerosene stove, over a gas or electric stove. Only higher, so as not to burn your hand! Even more convenient - over the iron, over a table lamp without a shade.

But there is a much more sensitive physical device, for which the heat of your body is quite enough! It's a paper spinner on a pin. It is no more difficult to make it than a snake.

Cut out a 4x4 cm square from thin, tissue paper is best. Bend it exactly from corner to corner - first along one diagonal, then along the other. Get a cap in the form of a sloping pyramid. Fold the corners of this pyramid in pairs this way and that to form more folds that go inside. Each side face of the pyramid is divided into two triangles. Take scissors and cut out a left triangle from each side. Only - mind! - do not cut to the very middle, leave 2 - 3 mm, otherwise everything will fall apart.

Spinner on a pin

It turned out a turntable with four oblique wings. Take a pin in your hand, point up, and place the pin on the point with the tip. Remove your other hand and wait a few seconds. See? The spinner turned slowly! It is rotated by a current of heated air. It rises from the hand in which you hold the pin. Of course, this current is very weak. But the turntable is light, and this is enough for her!

Author: Galpershtein L.Ya.

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