Dressed matchbox. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Dressed matchbox. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

The matchbox is on your hand. You hold your other hand over it. You ask an assistant to lift the boxes up. You say "Crawl slowly", "Stop", "Fall" and the box dutifully performs.

Focus secret:

Use an awl to make holes in the short walls of the box. Pull a meter-long fishing line into them. Put a weight eraser in the box. Close the boxes.

The secret is in tension. Pull the line to stop the boxes. To make him crawl slowly loosen it slightly. To make it fall, loosen the line more.

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Random news from the Archive

All the chemical ingredients of life found on Enceladus 25.12.2022

Phosphorus, a key component of DNA and RNA molecules, has been discovered in the ocean of Saturn's moon. It is now known that Enceladus has all the basic elements that make up biomolecules - everything necessary for the emergence of life.

Enceladus is one of the major moons of Saturn. Its surface is covered with a thick layer of ice, from the faults of which geysers are knocked out from time to time, indicating that there, at a depth, there is a fairly large ocean of liquid water. This makes Enceladus one of the most promising places to look for extraterrestrial life. This possibility is also indicated by the analysis of its water. Both methane and more complex organic molecules appear in it.

Over the years of research, compounds of hydrogen and oxygen, carbon, nitrogen and sulfur have been found in the geysers of Enceladus - almost all the ingredients that make up biomolecules. And recently, the last element was added to this list, phosphorus, which serves as a key component of nucleic acids. This was announced by Yasuhito Sekine, who spoke at a recent meeting of the American Geophysical Society (AGU) in Chicago.

Sekine and colleagues at the Tokyo Institute of Technology used data from the Cassini probe. Working in the Saturn system, the device collected information about the chemical composition of not only the planet and satellites, but also its brilliant rings. In this case, scientists were interested in the substances of the E ring, where the substance thrown out by the geysers of Enceladus falls. Among them were particles exceptionally rich in sodium phosphate.

Judging by their quantity, the subglacial ocean on the satellite can contain this substance in concentrations from one to 20 millimoles, which is orders of magnitude higher than in the Earth's oceans, where phosphorus is an element that is extremely scarce and in demand. The authors of the work suggest that on Enceladus it enters the water from the bottom, when apatites dissolve in it, which are found in abundance in some meteorites, which means that they were in the early solar system when the satellite was formed.

The find makes Enceladus an even more fascinating and promising place in terms of finding traces of extraterrestrial life. Perhaps this will speed up work on such projects, including the ESA mission, so far scheduled to launch only after 2035.

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