Coin and brush. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Coin and brush. The Secret of Focus

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

You place a coin on your open palm. In the other hand is an ordinary clothes brush. Then you invite anyone who wants to clean the coin from your hand with a brush. You can even promise to give a coin to the person who succeeds as a prize. Don't be afraid, you don't risk anything!

Focus secret:

In fact, no one, including you, will be able to clean the coin. The fact is that the bristles of the brush work in different directions: some bristles move the coin from the palm, while others, on the contrary, at the same time move it towards the center. So, after laughing with everyone else at the failures of others, do not rush to demonstrate your own dexterity in this trick.

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Random news from the Archive

fuel cell Mercedes 18.03.2014

Mercedes-Benz is developing "next generation environmentally friendly fuel cell vehicles".

Mercedes already has experience in this area. In particular, the company has developed the B-Class F-CELL model. In this car, hydrogen is stored in three tanks at a pressure of 700 bar. They are able to take together a little less than 4 kg of gaseous fuel. The tanks, according to the manufacturer, are absolutely hermetic and even when the machine is idle for a long time, they do not allow hydrogen to escape. Due to the high degree of gas compression, the B-Class F-CELL manages to cover distances of up to 400 km on a single filling.

The permanent magnet synchronous motor develops a peak power of 100 kW/136 hp. With. and a nominal torque of 290 Nm, characteristic of electric power plants, which is available to the driver from the first turn. A high-voltage lithium-ion battery is used as a source of stored energy.

For the B-Class F-CELL, Mercedes-Benz has further developed the fuel cell electric drive strategy. When starting a "cold" electric motor at low temperatures, it receives energy from both a lithium-ion battery and a "booting" fuel cell system. At higher temperatures, battery power is usually sufficient, while the fuel cells are connected later, depending on the load. While the vehicle is in motion, the energy management system keeps the F-CELL drive in the optimum operating range at all times. The lithium-ion battery dynamically compensates for power demand differences depending on the current driving situation.

With each braking and during periods without a foot on the gas pedal, the electric motor recovers the kinetic energy of the moving car, turning it into electrical energy, which is then stored in the battery.

It is reported that the next generation fuel cell car will use an advanced propulsion system. Market participants believe that it will be installed in a compact crossover. Apparently, the system is being developed jointly with Ford and Nissan in order to reduce the cost. An announcement is expected in 2017.

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