anonymous
  • anonymous
a light year is 9.5*10^12 km. the diameter of the milky way galaxy is estimated to be 100,000 light years. A) what is the diameter of the milky way im kilometers? B) the speed of light is about 3*10^8 m/s. what is the speed of light in kilometers per hour? C) about how many days would it take light to travel across the milky way? D) about how many years would it take light to travel across the milky way?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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welshfella
  • welshfella
100,000 = 1 * 10^5 lighyears
welshfella
  • welshfella
so A is 1 * 10^5 * 9.5 * 10^12
anonymous
  • anonymous
thats 9.5*10^17 right? @welshfella

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More answers

welshfella
  • welshfella
yea
welshfella
  • welshfella
for B you need to use the 2 conversion factors 1 km = 1000m and 1 hr = 3600 secinds
anonymous
  • anonymous
ok
anonymous
  • anonymous
so what do i do? @welshfella
welshfella
  • welshfella
to find meters per hour you multiply by 3600 then to find km / hr you divide the result by 1000
anonymous
  • anonymous
what do i multiply?
anonymous
  • anonymous
the answer to the last one? @welshfella
anonymous
  • anonymous
no wait i multiply it by the thing in the top right? @welshfella
welshfella
  • welshfella
no speed of light 3 * 10^8 multiply this by 3.6 * 10^3 then divide the result by 10^3
anonymous
  • anonymous
ok i got 1080000 @welshfella

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