Durable drawings on wooden plywood. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Durable drawings on wooden plywood. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Here is the recipe for durable drawings on plywood.

A solution is preliminarily prepared from 10 parts by weight of copper sulphate, 6 parts of Dutch soot and 3 parts of alcohol. Then, on the front side of the plywood, a light outline of the drawing is sketched with a blue pencil, after which the entire space circled in blue pencil is covered with a thin outline using a steel pen dipped in the above solution, which penetrates deep into the wood tissue.

When the entire drawing is dry, the plywood is placed under a tap of water in such a way that it is washed continuously for 20 hours with even and weak streams of fresh water.

With such processing, the drawing on plywood penetrates so deeply into the tree that its contours are clearly indicated on the opposite side of the plywood, and no matter how much the latter is then processed, the drawing will not be erased.

Author: Korolev V.A.

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If you hit a ball against a wall, it will bounce in the opposite direction in accordance with all the canons of classical physics. But the world of quantum physics is much more mysterious and unpredictable, if instead of a ball a quantum particle can suddenly appear on the other side of the wall thanks to a phenomenon called quantum tunneling. Despite the fact that this phenomenon has been studied quite well and is widely used for practical purposes, only recently a group of physicists managed to measure the time required for the "teleportation" of a particle from one place to another.

The phenomenon of quantum tunneling is used in electron microscopes, diodes, transistors and some other electronic components. It is this phenomenon that is responsible for the spontaneous decay of radioactive elements, it is with the help of quantum tunneling that the particles that make up the nuclei of atoms of radioactive elements leave the limits of these nuclei.

Despite the rather high degree of knowledge of the phenomenon of quantum tunneling, scientists until recently did not know for certain how long the process of particle transition through the barrier takes. Some of the scientists assumed that the tunneling was instantaneous, but this, in turn, means that the particle is moving faster than the speed of light and it can become a cause-and-effect violator.

To measure the time of quantum tunneling, researchers from Griffith University and the Australian National University "broke down" on hydrogen atoms the light of a powerful laser that emits 1000 pulses per second. This, according to scientists, should have created the right conditions under which the electron can "escape" from the atom and make it possible to measure the tunneling time.

As a result of the experiments, scientists received discouraging results. Quite likely, quantum tunneling occurs almost instantaneously, taking less than 1.8 attoseconds (one billionth of one billionth of a second) to complete.

An interesting fact is that this is not the first attempt to measure the quantum tunneling time. In 2017, researchers from the Max Planck Institute, Germany, using krypton and argon atoms, found that it takes about 180 attoseconds of time for particles to tunnel. However, scientists believe that the results of earlier experiments could have errors due to their complexity associated with the use of more complex atoms than hydrogen atoms, which have only one electron.

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