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Консультация № 138861
01.06.2008, 01:57
0.00 руб.
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1
1
неудобно уже просить...но помогите!!!
Частица движется со скоростью v=0,5 c (где с - скорость света в вакууме).Какую долю полной энергии состовляет кинетическая энергия частицы?
спасибо зарание))
Частица движется со скоростью v=0,5 c (где с - скорость света в вакууме).Какую долю полной энергии состовляет кинетическая энергия частицы?
спасибо зарание))
Обсуждение
Неизвестный
01.06.2008, 11:15
общий
это ответ
Здравствуйте, Knopka star!
формула для кинетической энергии такая:
Ek=m0*c^2/sqrt(1-(v/c)^2)
а для энергии покоя:
E0=m0*c^2
тогда можно выразить кинетическую энергию, через энергию покоя:
Ek=E0/sqrt(1-(v/c)^2)
E0/Ek=sqrt(1-(v/c)^2)=0.866
E0=0.866*Ek
полная энергия - это сумма кинетической энергии и энергии покоя
E=E0+Ek=Ek*0.866+Ek=1.866*Ek
E=Ek*1.866
E/Ek=1.866
Ek/E=1/1.866=0.536
итого:
Ek/E=0.536
формула для кинетической энергии такая:
Ek=m0*c^2/sqrt(1-(v/c)^2)
а для энергии покоя:
E0=m0*c^2
тогда можно выразить кинетическую энергию, через энергию покоя:
Ek=E0/sqrt(1-(v/c)^2)
E0/Ek=sqrt(1-(v/c)^2)=0.866
E0=0.866*Ek
полная энергия - это сумма кинетической энергии и энергии покоя
E=E0+Ek=Ek*0.866+Ek=1.866*Ek
E=Ek*1.866
E/Ek=1.866
Ek/E=1/1.866=0.536
итого:
Ek/E=0.536
Форма ответа
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