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17 March, 03:01

A Lua reflete parte da luz solar que nela incide. Admite que: a luz refletida pela Lua demora 1,28 segundos a chegar à Terra; entre a Lua e a Terra, a luz percorre 300 000 000 de metros em cada segundo; o trajeto da luz é retilíneo. Determina a distância da Lua à Terra. Apresenta o resultado em metros, escrito em notação científica. Mostra como chegaste à tua resposta.

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  1. 17 March, 03:10
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    3.84 * 10^8 meters

    Step-by-step explanation:

    As the speed of light is 300,000,000 meters/second and the time that the light takes to go from the moon to the Earth is 1.28 seconds, we can find the distance using the formula:

    Distance = speed * time

    So we have that:

    Distance = 300,000,000 * 1.28 = 384,000,000 meters

    In cientific notation, we need the first number to be in the interval from 1 to 10, so we have 3.84, and we have to multiply by 10^8 to reach our result, so we have:

    Distance = 3.84 * 10^8 meters
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