Restoration of a broken thread. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Restoration of a broken thread. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

The magician shows the audience an ordinary thread (for example, 50 cm long). Then the magician begins to tear the thread into 4 pieces. He winds three pieces into a ball and leans against the fourth piece, blows on it, pulls on the ends of the fourth small piece of thread and the lump of torn threads is restored into the former long thread.

Focus secret:

Before showing the trick to the audience, you need to prepare a thread. Namely, unwind not 50 cm, but twice as much, i.e. 100 cm. Half of this thread, without tearing off, wind into a ball and hide in the hand that will hold one of the ends of the thread.

Then everything is in focus. We tear the threads into 4 pieces. Three pieces are wound into a ball and tied to the 4th piece. In fact, we hide these three crumpled threads in our hands, and we take out and show the audience an already prepared lump of a whole thread. And as a result, we unwind the second half (second 50 cm) of the thread.

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natural refrigerator 23.05.2015

The problem of energy efficiency is solved not only by turning off the light in time: buildings must be built so that they can be easily heated in winter and cooled in summer. At the same time, the roof plays a decisive role; it is not for nothing that it is so carefully insulated.

However, the modern solution to the roof problem is to plant it with plants. For two decades, this technology has reached a high level, but many architects find it difficult to use it. In particular, they are unsure if the roof will deliver the claimed energy efficiency and lower cooling and heating costs for the building. Otherwise, it is difficult to convince the customer to go for additional costs.

A new mathematical model, built by engineers from the Polytechnic University of Madrid, made it possible to carry out an accurate calculation. It turned out that a densely planted roof can reduce the flow of heat coming to the building in summer by 60%.

For the city, the effect is even more significant - a green roof reflects only 9% of the incident heat. This is very important, because it is known that the thermal cap that occurs around megacities noticeably changes the climate within a radius of kilometers from its borders. True, a densely planted roof does not immediately become, because green friends need time to get stronger and become covered with leaves. While they have not grown, energy efficiency will not grow either.

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