Ex. 18. read the article quickly and give a short summary of it: ernst weber (1795—1878) was born in wittemburg, germany, thethird of 13 children. he received his doctorate from the university ofleipzig in 1815, in physiology. he began teaching there after graduation,and continued until he retired in 1871. his research focused on the senses of touch and kinesthesia. he wasthe first to show the existence of kinesthesia, and showed that touch wasa complex sense composed of senses for pressure, temperature and pain. his chosen interests led him to certain techniques: first, there is the two-point threshold, which is a matter of measuring the smallest distancenoticeable to touch at various parts of the body. for example, the tonguehad the smallest threshold (1 mm), and the back had the largest (60 mm). this is known as weber’s law, and is the first such “law” relating aphysical stimulus with a mental experience. ernst weber also named and studied discipline psychophysics, whichhe defined as the study of the systematic relationships between physicalevents and mental events. in 1860 he published the elements ofpsychophysics. in this work weber showed that psychological events are tied to measurable physical events in a systematic way, which everyone atthat time thought impossible.

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Объяснение:

Our planet Earth is only a tiny part of the universe, but nowadays it's the only place where we can live. People always polluted their surroundings. But until now pollution was not such a serious problem. People lived in rural areas and did not produce such amount of polluting agents that would cause a dangerous situation in global scale. With the development of overcrowded industrial highly developed cities, which put huge amounts of pollutants into surrounds, the problem has become more and more dangerous. Today our planet is in serious danger. Acid rains, global warming, air and water pollution, and overpopulation are the problems that threaten human lives on the Earth. In order to understand how air pollution affects our body, we must understand exactly what this pollution is. The pollutants that harm our respiratory system are known as particulates. Particulates are the small solid particles that you can see through rays of sunlight. They are products of incomplete combustion in engines, for example: internal-combustion engines, road dust and wood smoke. Billions of tons of coal and oil are consumed around the world every year. When these fuels are burnt, they produce smoke and other by-products, which is emitted into the atmosphere. Although wind and rain occasionally wash away the smoke, given off by power plants and automobiles, but it is not enough.. These chemical compounds undergo a series of chemical reactions in the presence of sunlight; as a result we have smog, mixture of fog and smoke. While such pollutants as particulates we can see, other harmful ones are not visible. Among the most dangerous to bur health are carbon monoxide, nitrogen oxides, sulfur dioxide and ozone or active oxygen. If you have ever been in an enclosed parking garage or a tunnel and felt dizzy or lightheaded, then you have felt the effect of carbon monoxide (CO). This odourless, colourless, but poisonous gas is produced by the incomplete burning of fossil fuels, like gasoline or diesel fuel. Factories emit tons of harmful chemicals. These emissions have disastrous consequences for our planet. They are the main reason for the greenhouse effect and acid rains. Our forests are disappearing because they are cut down or burnt. If this trend continues, one day we won't have enough oxygen to breathe, we won't see a beautiful green forest at all. The seas are in danger. They are filled with poison: industrial and nuclear wastes, chemical fertilizers and pesticides. If nothing is done about it, one day nothing will be able to live in our seas. Every ten minutes one kind of animal, plant or insect dies out forever. If nothing is done about it, one million species that are alive today may soon become extinct. And even greater threats are nuclear power stations. We all know how tragic the consequences of the Chernobyl disaster are. Fortunately, it's not too late to solve these problems. We have the time, the money and even the technology to make our planet a better, cleaner and safer place. We can plant trees and create parks for endangered animals. We can recycle our wastes; persuade enterprises to stop polluting activities, because it is apparent that our careless use of fossil fuels and chemicals is destroying this planet. And it is now more than ever apparent that at the same time we are destroying our bodies and our future.