anonymous
  • anonymous
A car is traveling at 118 km/h. What is its speed in mm/h?
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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aaronq
  • aaronq
convert km to mm 1 km = 1 000 000 mm
anonymous
  • anonymous
Is there a way u could show me in the dimensional analysis?
aaronq
  • aaronq
\(118 \;km*\dfrac{1,000,000 mm}{1\;km}\) then just add "per hour", \h, to the answer

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anonymous
  • anonymous
So its 118000000 right?
aaronq
  • aaronq
don't forget the units
anonymous
  • anonymous
Yea ok
anonymous
  • anonymous
Is that it?
aaronq
  • aaronq
you tell me, do you think that answers the question?
anonymous
  • anonymous
Yes but wat abt mm/h?
aaronq
  • aaronq
what about it?
anonymous
  • anonymous
Can u please show me how to do it step by step in dimensional analysis while explaning?
aaronq
  • aaronq
we already did it. We found how many mm are in said km, since the time units are the same, there is nothing else to be done.
anonymous
  • anonymous
Oooh lol sorry. I was thinking of the example the teacher showed me today. Sorry
aaronq
  • aaronq
it's okay. if you were also changing the time intervals (say hours to seconds) then you would have do further conversions.
anonymous
  • anonymous
Can u show me an example?
anonymous
  • anonymous
Please
aaronq
  • aaronq
1 km/h to 1 m/sec \(1\; km/hr*\dfrac{1000\;\color{red}{m}}{1\;km}*\dfrac{1\;hr}{60\;min}*\dfrac{1\;min}{60\;\color{red}{sec}}\) notice the units are cancelling out, and you only end up with m/sec
aaronq
  • aaronq
you're essentially cancelling out units by multiplying by its values. 60 min in 1 hr 1000 m in 1 km etc.
anonymous
  • anonymous
Ooh k that makes sense. Got it thanx!! Btw do u kno an app for this?
aaronq
  • aaronq
ok cool. no, i'm sure if you search there'll be one though.
anonymous
  • anonymous
Alright...im moving to algebra 2 can u help me please?
aaronq
  • aaronq
I gotta go in a few min, sorry. You should ask those questions in the math section, though.
anonymous
  • anonymous
K thanxx!!!

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