BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Which court considers Wikipedia a reliable source of information? Detailed answer Directory / Big encyclopedia. Questions for quiz and self-education Did you know? Which court considers Wikipedia a reliable source of information? In the German judiciary, Wikipedia (in German) is considered a generally accepted reliable source of information. Authors: Jimmy Wales, Larry Sanger Random interesting fact from the Great Encyclopedia: What is dew? You may think that dew is a simple phenomenon of nature, easily explained. Oddly enough, for a long time they could not understand what dew is. Many books have been written on this subject. From the time of Aristotle until the XNUMXth century, it was believed that dew "falls" just like rain. But the dew does not "fall out" at all. The well-known dew that we see on the leaves of plants is not dew at all! You see how wrong we were about dew. In order to understand what dew is, we must know something about the air that surrounds us. The air contains a certain amount of moisture. Warm air contains more moisture than cold air. When air comes into contact with a cold surface, some of it condenses and the moisture it contains remains on that surface. This is dew. The temperature of such a cool surface must be below a certain value at which dew forms. This value is called the "dew point". For example, if you pour water into a glass or a metal vessel, this does not mean that dew forms on their surface. If you add ice there, then dew does not form immediately, but only after the surface of the vessels has cooled to a certain temperature. How is dew formed in nature? This requires warm moist air, which must come into contact with a cold surface. Dew does not form on the ground or paths, as they retain the heat of the sun for a long time. And on grass or plants that have cooled down, dew forms. Then why did we say that drops on plants are not dew? Because only a small part of the moisture that we observe on plants in the morning is dew. Most of the moisture (and sometimes all the moisture) is produced by the plant itself. Moisture comes out of the plants through the pores of the leaves. This is a continuation of the process of irrigating the plants to provide the leaves with water from the ground. This process begins during the day to protect the leaf surface from the heat of the sun, and continues at night. In some parts of the world, so much dew falls that it is collected in special tanks for watering livestock!
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