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Цепь состоит из последовательно соединенных проводников, сопротивление которых 2,5 и 10 Ом. Сила тока в цепи 0,5 А. Найдите напряжение на каждом из проводников и общее напряжение
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Предмет:
Физика -
Автор:
douglasvhqk - 5 лет назад
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Ответы 1
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R=R1+R2R=2,5+10=12,5 ОмU=IRU=0,5*12,5=6,25BI1=I2=I=0,5AU1=0,5*2,5=1,25BU2=0,5*10=5B
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Автор:
maggie56 - 5 лет назад
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UKRAINIANS IN SPACE ENGINEERING
Speaking about the development of rocket and space engineering in the former USSR, the world usually connects this with the name of Academician Serhii Koroliov, an outstanding creator of the practical space engineering. Many people regard him as a representative of the Russian people. However, Serhii Koroliov is a Ukrainian. He himself attested his belonging to the Ukrainian people when he filled in a form while entering the Kyiv Polytechnic.
Serhii Koroliov, who was born in the city of Zhytomyr, is one of the most outstanding Ukrainians whose name will go down in history of the world civilization.
But his titanic deeds were possible owing to accurate and well coordinated work of numerous organizations. And some of them were headed by our compatriots.
Mykhailo Yangel, Volodymyr Chelomei, Valentyn Hlushko should be mentioned here.
Mykhailo Yangel created a new direction and his own school in developing rocket and space equipment. He worked in Dni-propetrovsk at "Pivdenmash". To honour the name of Mykhailo Yangel a medal was created which is the award for achievements in space engineering. His name was given to a street in Kyiv too.
Valentyn Hlushko was a general designer of rockets.
Volodymyr Chelomei headed the creation of the carrier rockets.
Speaking about Ukrainians' contribution into creation of rocket and space technology we should remember about scientific basis they used. This basis was created, in part, as early as in the 19th century by our compatriots. They were Olexan-der Zasiadko (1779-1834), Kostiantyn Kostiantynov (born in 1817 or 1818), Mykola Kybalchych, who died at the age of 28, Kostiantyn Tsiolkovskyi, who came from the glorious Cossack family of Nalyvaiko, Yurii Kondratiuk, who made calculations for the manned flight to the Moon. Americans used these calculations in 1969 when they sent their astronauts to this satellite.
It should be mentioned that Mykhailo Yarymovych and Ihor Bohachevskyi considerably helped Americans to solve the problems connected with space flight to the Moon and back.
Ihor Bohachevskyi always stresses: "In order to be a success in life, you should demonstrate that you can do something. And you should prove this with what you have already done".-
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