Two Step Conversions

For review of how to do basic conversions!

Two Step Conversions
Theses are harder conversions so stop at the base unit (meter, second, gram etc.) first.

1. ex: convert 700nm into hectometers.
Map out the route (remembering the chart of prefixes)
nanometers --> meters --> hectometers
nano= 10^ -9
meters=base unit
hecto= 10^ 2

2:    700nm x     1m     x    1hm   = 7 x 10^ -9 hm
          1           109 nm      100m

Derived Quantity
     - a derived quantity is when there is more then one unit (ex. km/hr)
ex: Convert the rate 21m/min into km/hr
      (two separate unit conversions)

meters --> kilometers x hours --> minutes
Kilo= 10^ 3
1 hour=60 min.


21m x   1km   x  60min  = 1.26km/hr
    1       1000m      1hr