Протягом 20 хв здійснювалось дугове зварювання труби при напрузі 36в. Визначте силу струму апарата якщо за цей час була виконана робота 600кдж
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Despite the fact that science has been known for about two million species of animals, constantly open up new types, the existence of which no one previously knew.and this applies not only to insects and mollusks, but also to mammals. discoveries in the 21st century.1. snub-nosed monkey, sneezing in the rain. this monkey has found a group of swiss primatologist thomas gayssmana in 2010. arriving at the north of myanmar, the researchers saw a snub-nosed monkey, which surprised them the structure of your nose. due to the fact that her nostrils nothing covered, this monkey sneezes when it rains, so is forced to hide his head between his knees during inclement weather.2, egyptian wolves, which was taken as the jackals. it is no secret that in the north of africa inhabited by little wolves. for a long time we continue to argue about whether they are really wolves or jackals are. but in 2011, the examination showed that the closest relatives of these animals are wolves. to date, representatives of this type, there are about a few dozen, but unfortunately, the law for their protection did not exist.3. monkey with expressive look.lesula monkey was discovered in 2007 in the central part of the democratic republic of the congo. the first biologist john hart saw her home near the school director, who took it from one of the locals. because hunters this rare species threatened with extinction, but the state assistance in this regard count is not necessary.4. the greater dwarf lemur with confusing classification. scientists believe that the classification of rat lemurs is not yet finished. last recognized species was discovered in 2001 in the south of madagascar, but it took more than 10 years to collect the full material and analyze it.5.dikie cats that resemble miniature yaguarov.v 2013 has been allocated to a separate subspecies oncilla view. through the examination of dna was carried out by eduardo eyzirikom, it was proved that this kind of crosses are not with their subspecies and geoffroy cats living in the neighborhood
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