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Weakness of the ice. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

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Ordinary ice is a serious thing, sometimes even dangerous. But he has a weak point. Ice can be cut... with wire!

Place a block of ice or a large icicle on the backs of two chairs. Throw a loop of steel wire no more than 0,5 mm thick on this ice and hang two irons from it. Slow, steady, the wire cuts into the ice. Deeper, deeper ... And now boom! The irons fell, the wire went through. Look, the ice block hasn't broken up! He is intact, as if he had not been cut. How could this happen?

Weak spot of ice

Ice melts under pressure. For example, under the blades of skates. If the blades are blunt, the skates glide well only in warm weather, and in the most severe frost and sharp skates glide poorly. The ice is too cold, it does not melt, there is no water "lubrication" that facilitates sliding.

Under the pressure of the wire, the ice also melts. But the water flows over the wire. There is no pressure here, and it immediately freezes again. So the cut ice bar "grows together".

Author: Galpershtein L.Ya.

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Chirality - the incompatibility of the molecular structure of a substance with its mirror image - is inherent in many organic substances. Optical isomers of such substances polarize light differently. For metals, no one noticed such an ability. This is understandable: their lattices are quite symmetrical.

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