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С какой силой взаимодействуют два заряда по 20 нКл, находящиеся на расстоянии 6 см друг от друга?
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Закон Кулона: F = k|q₁||q₂|/r² = kq²/r² = 9 · 10⁹ · 400 · 10⁻¹⁸/36 · 10⁻⁴ = 10⁻¹¹ Н = 10 пН
Ответ: 10 пН
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Автор:
foster - 5 лет назад
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В коробке находится 10 черных, 6 белых и 4 красных шариков. Из коробки наугад вынимают два шарика подряд. Какова вероятность того, что оба шарика окажутся белыми?
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помогите перевести пожалуйста!! When preparing to fly, passengers are requested to arrive at the airport 2 hours before departure
time. They must register their tickets, get a seat assignment, and weigh and check their luggage.
Most airlines have at least 2 classes of travel, first class and economy class. Economy class tickets
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for first class passengers. If you check excess luggage you'll have to pay a fee calculated by the
number of extra pieces and the extra weight. Every passenger is also allowed one small carry-on
bag, for instance a laptop computer or small suitcase.
The rules for passengers who are traveling abroad are similar in most countries but there are,
sometimes, slight differences. Here are some things to remember: if, for instance, you need to go
through Customs, try to fill in the customs declaration before you talk to the customs officer. He
will ask every passenger the same, routine questions about whether he is carrying anything he
wants to declare: like tobacco, alcohol, presents, and sums of money.
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destination. The next formality is filling in the immigration form and going through passport
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