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вычислите полную механическую энергию спутника земли масса 2т если он движется со скоростью7,9км/с на высоте 10000км
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Предмет:
Физика -
Автор:
constantinoharrison - 6 лет назад
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Ответы 1
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m=2 т=2000 кг, v=7.9 км/с=7900 м/с, h=10000 км=10000000 м, g=1.5 м/с^2; E=?E=Eп+Ек=mgh+mv^2/2=2000*1.5*10000000+(2000*62410000)/2=30000000000+62410000000=92410000000 Дж=92.41 ГДж.
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Автор:
kadencegross - 6 лет назад
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There is probably no one among book-lovers who has not heard of Sherlock Holmes in the stories by Arthur Conan Doyle. Sherlock Holmes's method of analyzing the most difficult problems was to notice the smallest facts, even if they seemed unimportant. His method never failed; the criminal always had to give up, and to become the prisoner of the great detective. Conan Doyle once arrived in Paris, after spending a month in the south of France. There was a long row of cabs outside the gate of the railway station. Conan Doyle got into the first cab and ordered the driver to take him to a good hotel. The driver was silent all the way to the hotel, but when Conan Doyle paid him, he said, "Thank you, Sir Arthur Conan Doyle". "How do you know who I am?" Conan Doyle asked in the greatest surprise. "I have never seen you before", the man answered, "so I can't pretend that I recognized you. But I read in the newspapers that you were expected in Paris after your vacation in the south of France. The train you arrived on came from the south of France. I could tell from your clothes, especially your hat, and also from the strange way you pronounce French words that you were English. These facts helped me to guess that you were probably Sir Arthur Conan Doyle". "Fine work! Wonderful!" Conan Doyle cried. "You analyzed the facts quite correctly. It's a pity you aren't a detective!" "Of course", the driver added, "your name is on both your travelling bags. I can't pretend that fact didn't help". Questions: 1. What is the main idea of the text?
2. Where did Conan Doyle once arrive in?
3. How did the cabman surprise Conan Doyle?
4. How did the cabman find out it was Conan Doyle?
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