Desafio: Viagem no tempo 55


Como é possível uma pessoa sair de um lugar, viajar algumas horas e chegar em outro lugar horas antes de sua saída?

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Resposta:

Se uma pessoa percorre larga distância de leste a oeste no globo terrestre ela passará por um ou mais fusos horários. Se a velocidade de deslocamento for alta, o gasto de tempo na viagem será inferior ao ganho de tempo correspondente a diferença de fuso horário. Neste caso o horário no local de chegada será inferior ao horário do local de saída.

Um exemplo é ir de Tóquio, no Japão, a Los Angeles, nos Estados Unidos. Essa viagem tem duração de 10 horas, mas a diferença de fuso é de 5 horas para menos. Ou seja, se o viajante sai às 18h do Japão chegará aos Estados Unidos às 11h do mesmo dia no horário desse país.


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55 pensamentos em “Desafio: Viagem no tempo

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    The Zune concentrates on being a Portable Media Player. Not a web browser. Not a game machine. Maybe in the future it’ll do even better in those areas, but for now it’s a fantastic way to organize and listen to your music and videos, and is without peer in that regard. The iPod’s strengths are its web browsing and apps. If those sound more compelling, perhaps it is your best choice.

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    The new Zune browser is surprisingly good, but not as good as the iPod’s. It works well, but isn’t as fast as Safari, and has a clunkier interface. If you occasionally plan on using the web browser that’s not an issue, but if you’re planning to browse the web alot from your PMP then the iPod’s larger screen and better browser may be important.

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    Zune and iPod: Most people compare the Zune to the Touch, but after seeing how slim and surprisingly small and light it is, I consider it to be a rather unique hybrid that combines qualities of both the Touch and the Nano. It’s very colorful and lovely OLED screen is slightly smaller than the touch screen, but the player itself feels quite a bit smaller and lighter. It weighs about 2/3 as much, and is noticeably smaller in width and height, while being just a hair thicker.

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    The new Zune browser is surprisingly good, but not as good as the iPod’s. It works well, but isn’t as fast as Safari, and has a clunkier interface. If you occasionally plan on using the web browser that’s not an issue, but if you’re planning to browse the web alot from your PMP then the iPod’s larger screen and better browser may be important.