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science

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light trsavels at 3*10 m/s. an astrounaut shines a flash light in space. 4 hours later a martian sees a light from the astrounaut. how far away is mars from the astrounaut?

  • science -

    distance = speed * time
    = 3*10^10 m/s * 4 hr * 3600s/hr = 4.32*10^14 m

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