Curie point. Drawing, description

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Curie point. Children's Science Lab

Children's Science Lab

From iron wire or sewing needles, make a star like the one shown in the figure and place it on the tip of the needle. Place a magnet and a candle or a good gas lighter next to the star. Light a fire and wait. As soon as the ray of the star becomes red hot, the star will turn, and its next ray will be attracted to the magnet. The rotation will stop only when the fire goes out.

Curie point

The essence of the phenomenon is that hot iron, unlike cold iron, is not attracted to a magnet. The temperature at which iron "demagnetizes" is called the Curie point.

Today there are materials having a Curie point of 60 to 100°C, in the form of thin foil. With them, the experience will be much brighter. I must say that this trick makes sense. Based on this principle, it is possible to create a heat engine, to which many serious scientific studies have been devoted.

If it were possible to transfer all possible heat from a hot place to a cold one and add a little heat from a candle, a very good economical engine would turn out.

So far, no one has succeeded. But maybe you'll be lucky?

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A black hole can become a portal 07.09.2020

Scientists have proposed how to make a portal out of a black hole. We are talking about a stable tunnel that can accommodate a spaceship, despite the fact that for a long time the wormholes were either too small or too unreliable.

Research in this direction was carried out by specialists from Princeton. Scientists have found confirmation of the possibility of creating a "wormhole" in space, which will be enough, among other things, to fit a full-fledged ship. In such a wormhole, one can travel, not only through space, but also through time. A starship would be able to travel to distant points in the universe in moments, but by earthly standards, such a "journey" would take thousands of years.

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