anonymous
  • anonymous
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.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
time from the earth to the moon = 240000m /(3.00*10^8)m/s time = .0008s therefore to the moon and back = .0016s
anonymous
  • anonymous
understand?
anonymous
  • anonymous
well its miles to meters

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anonymous
  • anonymous
so first have to convert
anonymous
  • anonymous
oh ok ill fix it then thx
anonymous
  • anonymous
1 mi = 1609.34 m
anonymous
  • anonymous
kk
anonymous
  • anonymous
but i do understand what you did and thanks
anonymous
  • anonymous
this dimensional analysis stuff does not agree with me at times lol
anonymous
  • anonymous
ok then make the correction and it'll look like this time = 240000*1609.34/(3*10^8)
anonymous
  • anonymous
haha kk :)
anonymous
  • anonymous
n of course multiply the answer by 2
anonymous
  • anonymous
you could just begin with 480000 right?
anonymous
  • anonymous
yea u could just because its doesnt throw off the working
anonymous
  • anonymous
480000 mi * 1609.34m/mi * s/300000000
anonymous
  • anonymous
300000000 m oops
anonymous
  • anonymous
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
anonymous
  • anonymous
i still get the wrong answer i think >.< i get 2.57 s
anonymous
  • anonymous
yea that is the correct answer
anonymous
  • anonymous
(4800000 * 1609.34)/300000000 = 2.57s
anonymous
  • anonymous
yep
anonymous
  • anonymous
k thanks a ton
anonymous
  • anonymous
sure thing :)

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