Remove a coin from the water without getting your hands wet. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Remove a coin from the water without getting your hands wet. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Place a coin on a flat plate and pour in some water. The coin will appear under water.

Now invite your friend to take the coin with your bare hand, without getting your fingers wet or pouring water from the plate. He's unlikely to figure out how to do it.

Focus secret:

And the trick is that the water must be sucked off. But not by mouth, of course. After all, it is not known where this coin was lying, in what hands it was.

Take a thin glass, rinse it with boiling water and tip it onto a plate next to the coin. Now watch what happens.

The air in the glass will begin to cool. And you've probably already heard that cold air takes up less space than hot air. We will talk about this in more detail in due course. One way or another, the glass, like a medical blood-sucking jar, will begin to suck in water, and soon everything will gather under it. Now wait until the coin dries and pick it up without worrying about getting your fingers wet!

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Earth's climate is changing 17.03.2013

According to a study by scientists from Louisiana State University, the Earth, even after the most powerful glaciation, can thaw almost instantly (by geological standards, of course). The culprit in this process is carbon dioxide. Considering that our civilization emits a huge amount of CO2 into the atmosphere, the news about the great mobility of the planet's climate is of particular importance.

Approximately 635 million years ago, almost the entire Earth was bound by ice. This glaciation, known as the Proterozoic, occurred before the advent of life. It was it that led to the formation of the current climatic conditions: with a temperature comfortable for life and a high level of oxygen. Thanks to the Proterozoic glaciation, there was a real explosion in the development of living organisms in the late Cambrian period and, ultimately, man appeared.

Until now, scientists have not understood how the Earth, frozen to the tropics, thawed so quickly and restored the balance between the new atmosphere, hydrosphere and biosphere. To answer this question, scientists conducted a study of the sulfate mineral barite (BaSO4), which has been preserved in rocks since the Proterozoic glaciation. This mineral absorbs oxygen during growth and contains 3 stable oxygen isotopes: O-16, O-17 and O-18. In barite from the time of the Proterozoic glaciation, the isotope O-17 was less than expected. Scientists suggest that this is due to the very high content of carbon dioxide in the atmosphere.

Thus, 635 million years ago, very large-scale changes took place in the atmosphere of our planet. Apparently, they are connected with the fact that the ocean was almost completely covered with ice. As a rule, the levels of carbon dioxide in the atmosphere are in equilibrium with the levels of carbon dioxide in the ocean. However, if water and air are separated by a thick layer of ice, as was the case during the Proterozoic glaciation, the level of CO2 in the atmosphere rises sharply.

Thus, the Proterozoic glaciation ended with a powerful greenhouse effect, which very quickly warmed up the planet and, in fact, prepared a comfortable "sandbox" for the development of the most diverse animal and plant life on Earth. A similar increase in the concentration of carbon dioxide in the atmosphere is observed now, only today it is caused by man-made causes.

The study by American scientists also demonstrates how quickly our planet can recover, even after the most massive and catastrophic events. We can not worry about our planet - it is able to save life and give rise to new species in any situation. True, it is not a fact that the Earth will "take care" of people who themselves will "pull the trigger" of global change.

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