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anonymous

  • 5 years ago

Alright one more.. The speed of light is 1.86 x 10^5 miles per second. If the average distance between the Earth and the Sun is 1.5 x 10^8 kilometers, how many minutes will it take a beam of light to reach the Earth from the Sun? Round to the hundredth.

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  1. anonymous
    • 5 years ago
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    Velocity is defined as\[v = {\rm distance \over time}\]We know velocity and distance, therefore, \[t = {d \over v}\]

  2. anonymous
    • 5 years ago
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    Don't have to change the km to fit the miles or anything?

  3. anonymous
    • 5 years ago
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    yes. you do :). good job. si gives distance in km. change it to km/s and then divide. Remember to covert from seconds to min afterwards or you will have the answer*60.

  4. anonymous
    • 5 years ago
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    Alright thanks both of you(:

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