Capillarity and match. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Capillarity and match. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Let's do two more fun experiments with chopsticks.

Put a broken stick on the neck of a milk bottle, and a dime on it. Try throwing this dime into the bottle without touching it, the bottle, or the stick. Don't know how to do it?

Capillarity and match

But the solution is so simple! Dip your finger in the water and drop one or two drops on the place of the stick where it is broken. The fold of the stick got wet... The ends diverge, more and more. Ding - and a dime at the bottom of the bottle!

For the second experiment, you will need five matches. Break them all in the middle, bend them at an acute angle and put them on a saucer as shown in the picture. How to make a five-pointed star out of these matches without touching them?

Capillarity and match

I think that by now you can figure it out yourself. Of course, you need to drop a few drops of water on the folds of matches! Gradually, the matches will begin to straighten out and form a star.

The reason for both experiments is the same. Wood fibers absorb moisture. She crawls further and further along the capillaries. The tree swells. Its surviving fibers "get fat". Having become fat, they can no longer bend so much and straighten up.

Author: Galpershtein L.Ya.

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