Put on the rope without touching the ring. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Put on the rope without touching the ring. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Place a ring (or small hoop) in the very center of an unclothed table. Pass a piece of twine to the audience and offer to put a ring on it. You can't touch the ring with anything. If the viewer does not figure out how to do this trick, take the twine and put a ring on it yourself.

Focus Put on the rope without touching the ring

Focus secret:

Raise the edge of the table a little, allowing the ring to move one third beyond the opposite edge. It remains only to skip the twine through this part of the ring and pull the ring off the table.

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Random news from the Archive

Biochemistry for automotive fuel 24.04.2015

On the roads, you can increasingly see cars that use gas instead of gasoline. These are mainly commercial vehicles - trucks or buses, for which it is more economical to drive on gas. Inside the red cylinders marked "flammable" is usually propane gas or a mixture of it with other hydrocarbons, such as butane.

All these hydrocarbons are obtained by processing gas or oil extracted from the bowels of the earth, which mankind has learned to use as fuel or as a raw material for the production of all kinds of plastics. Recently, however, technologies for obtaining fuel from biological raw materials have been widely developed. But if terms like bioethanol or biodiesel have been around for a long time, what about "biogas"?

They learned how to get methane from biological waste - the simplest of a number of hydrocarbons. For this, special bioreactors are used. In them, special types of bacteria process biomass, resulting in a mixture of gases, consisting mainly of the methane we need. Then it can be cleaned of impurities, pumped into special containers under pressure and used as fuel. Such a process has been created, worked out and there are already buses that run on biogas. However, there is one problem, and it lies in the difference in the properties of methane from heavier gases.

The fact is that propane and butane can be converted into a liquid state at ordinary temperature and relatively low pressure. Take, for example, an ordinary household lighter - a thin case made of transparent plastic is enough to safely store liquefied hydrocarbons. But this will not work with methane - in order to convert methane into a liquid, it will have to be cooled to a temperature of - 82 ° C. Therefore, in order to stock up on the necessary amount of methane, one has to use a container that can withstand a pressure of several hundred atmospheres.

This makes methane a much less convenient transportation fuel than propane. However, if bacteria that can synthesize methane exist, then everything is much more sad with the synthesis of complex hydrocarbons: in nature there are no such biological processes that would result in the formation of propane.

Researchers from the Department of Biotechnology at the University of Manchester have tackled this problem and come up with a way to make biopropane. To do this, they artificially changed the biochemical process by which the E. coli bacterium can produce alcohol - butanol. Butanol or butyl alcohol differs from the well-known ethyl alcohol in the length of the carbon chain - it has four carbon atoms, and not two, like ethanol. Biochemists managed to change the direction of the process so that propane was obtained in the last stage of the reaction instead of butanol.

Of course, so far this is nothing more than a laboratory study that has shown a way in which complex hydrocarbons of biological origin can be obtained. However, it has a chance to become the basis of an alternative way to obtain efficient fuel.

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