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Match-Phoenix. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

The performer informs the audience that it doesn’t cost him anything to re-light a match that has already burned out once. Naturally, this statement will cause incredulous looks from those gathered around the table. Then the magician, in front of everyone, takes one of the matches from the ashtray, strikes it on the box - and it ... lights up.

Focus secret:

The match must be prepared in advance. Grind off some wood near the head with a sharp knife, now paint the worn part with black ink or leather paint.

Focus Match-Phoenix

Such a match will look burnt. It remains to toss it in the ashtray in advance, and the rest - for your acting skills.

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Random news from the Archive

A class of materials with variable mechanical properties has been created 20.05.2012

Scientists at the Karlsruhe Institute of Technology (KIT) have succeeded in creating a new class of materials that can have almost any mechanical properties.

Based on new stable crystalline metafluids, it is possible to create, for example, unique acoustic prisms and completely new acoustic and optical systems.

The new material belongs to the pentamode class proposed in 1995 by Graham Milton and Andrey Cherkaev. Then it was a purely theoretical concept of the mechanical behavior of materials such as gold or water, expressed in compression and shear parameters. For example, water cannot be compressed in a cylinder, but can be stirred with a spoon, so it can be described in terms of compression and shear.

The word penta is of ancient Greek origin and means "five". In the case of water, five shear parameters are zero, and only one parameter (compression) differs from this value. From this point of view, the ideal state of a pentamode metamaterial corresponds to the state of water, which is why these materials are called metafluids. Theoretically, by changing the appropriate parameters, it is possible to obtain a material with any conceivable mechanical properties. But so far it has not been possible to create pentamode material.

German scientists have created a prototype of a unique polymer whose mechanical behavior is determined by the sharpness and length of four individual "beams" of an artificial base nanostructure. This required a number of difficult conditions to be met. On the one hand, it was necessary to create specific structures in the nanometer range and connect them to each other at right angles. On the other hand, it was necessary to create a full-fledged large three-dimensional structure, in other words, a "piece of material".

To do this, I had to use the laser beam recording technique developed by Nanoscribe. It consists in structuring light-sensitive materials in three dimensions using a pulsed laser and allows the production of complex microscopic structures of a given shape.

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