Science
posted by Emma .
How do you do a double conversions and metric measurements?
32km/hr > m/s
Like how do you convert that?

V = 32km/h = 32000m/3600s = 8.89 m/s.
32km = 32,000 m.
1h = 3600s. 
anything/divided by the same thing does not change anything really but the name of it
so multiplying by (1000 m/ 1 km ) for example
does not change the amount, just its name
so
(32 km/hr)(1 hr/3600s)(1000 m/km)
hr cancels, km cancels
comes out in m/s 
That trick does not matter here, but when you get problems with a whole bunch of conversions needed, it sure helps.

Yes, I use that trick when there are more conversions than we have here.