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Какую разность потенциалов пролетел электрон по силовой линии однородного эл.поля, если его скорость увеличилась в 5 раз? начальная скорость электрона 1 Мм/с, модуль его заряда 1,6*10-19 Кл, масса электрона 9,1*10-31 кг.
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Предмет:
Физика -
Автор:
vicente5qql - 6 лет назад
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Ответы 1
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m*(V^2-V0^2)/2=e*UU=m*(V^2-V0^2)/2*e=9,1*10^-31*(25-1)*10^12/2*1,6*10^-19=68,3 В
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Автор:
brandy - 6 лет назад
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Перевод срочно!!!
Many experts on different subjects believe that there are already too many people in the world. Unless there are great changes in the way people think about the number of children they should have, the world’s population will double in twenty-five years. There will be more than 20 cities with population greater than 20 million people. At present there are only three.
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Another major problem we will have to face as the world’s population grows is a shortage of energy. We are using up coal and oil and when they have been exhausted, we will have to find something instead of them. It is true that we can make electricity from the heat of the sun and moving water, but we do not yet have the technology to produce great amounts of this energy.
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