Paper and paperclip. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Paper and paperclip. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Show the audience a piece of paper with a paper clip attached to it. Ask them to remove the paperclip without touching it. Nothing will work if there is no ingenuity.

Focus secret:

It is necessary to fold the sheet in half in advance and put a paper clip on the place of the inflection. If you then stretch the ends of the sheet to the sides, the paper itself will drop the paper clip.

Author: V.Postolaty

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The main problem of new generation lithium batteries is solved 07.11.2016

Researchers from the University of Cambridge, along with employees of the Beijing Institute of Technology, have developed a new generation of lithium-sulfur batteries.

The principle of operation of the battery resembles the functioning of the human small intestine.

In the new development, scientists managed to overcome the main problem of lithium-sulfur batteries, which was the gradual loss of their capacity. So, the sulfur-containing cathode is separated from the electrolyte by a special membrane, which in structure resembles the fibers found in the small intestine.

Like the walls of the small intestine, this layer of zinc oxide fibers is able to trap fragments of the active substance and attach them to the conductive lattice. This allows the battery materials that have been degraded to be reused.

Study author Deng Zhao claims that the specific energy of a lithium-sulfur battery is five times that of a lithium-ion battery, which is used in most portable devices. However, he added that the battery is not yet able to go through a large number of charge-discharge cycles.

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