Respostas

2013-08-01T19:46:54-03:00
Frequencia = Voltas / Segundo

120 min = 120*60 = 7200 segundos

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Frequencia = 1 / 7200 = 1,39*10^-4 Hz.
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Periodo = 1 / Frequencia

Periodo = 1 / 1,39*10^-4

Periodo = 10^4/1,39

Periodo = 10.000 / 1,39

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Periodo = 7.194 ~= 7200 segundos
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