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ChrisV Group Title

The distance from Earth to the Moon is approximately 240,000 mi. The speed of light is 3.00 * 10^8 m/s. How long does it take for light to travel from Earth to the Moon and back again? Please Show work.

  • 2 years ago
  • 2 years ago

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  1. HawkCrimson Group Title
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    time from the earth to the moon = 240000m /(3.00*10^8)m/s time = .0008s therefore to the moon and back = .0016s

    • 2 years ago
  2. HawkCrimson Group Title
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    understand?

    • 2 years ago
  3. ChrisV Group Title
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    well its miles to meters

    • 2 years ago
  4. ChrisV Group Title
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    so first have to convert

    • 2 years ago
  5. HawkCrimson Group Title
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    oh ok ill fix it then thx

    • 2 years ago
  6. ChrisV Group Title
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    1 mi = 1609.34 m

    • 2 years ago
  7. HawkCrimson Group Title
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    kk

    • 2 years ago
  8. ChrisV Group Title
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    but i do understand what you did and thanks

    • 2 years ago
  9. ChrisV Group Title
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    this dimensional analysis stuff does not agree with me at times lol

    • 2 years ago
  10. HawkCrimson Group Title
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    ok then make the correction and it'll look like this time = 240000*1609.34/(3*10^8)

    • 2 years ago
  11. HawkCrimson Group Title
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    haha kk :)

    • 2 years ago
  12. HawkCrimson Group Title
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    n of course multiply the answer by 2

    • 2 years ago
  13. ChrisV Group Title
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    you could just begin with 480000 right?

    • 2 years ago
  14. HawkCrimson Group Title
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    yea u could just because its doesnt throw off the working

    • 2 years ago
  15. ChrisV Group Title
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    480000 mi * 1609.34m/mi * s/300000000

    • 2 years ago
  16. ChrisV Group Title
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    300000000 m oops

    • 2 years ago
  17. HawkCrimson Group Title
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    if this is home work then you shouldnt multiply by 2 first actually cause yes you'll get the rigt answer but when u write ur statements u'll have to explain y u muliplied by 2 n it makes more sense to do it after

    • 2 years ago
  18. ChrisV Group Title
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    i still get the wrong answer i think >.< i get 2.57 s

    • 2 years ago
  19. HawkCrimson Group Title
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    yea that is the correct answer

    • 2 years ago
  20. ChrisV Group Title
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    (4800000 * 1609.34)/300000000 = 2.57s

    • 2 years ago
  21. HawkCrimson Group Title
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    yep

    • 2 years ago
  22. ChrisV Group Title
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    k thanks a ton

    • 2 years ago
  23. HawkCrimson Group Title
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    sure thing :)

    • 2 years ago
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