Monday, August 22, 2011

Unit Analysis: Both Numerator & Denominator


Changing both the unit in the numerator and the denominator is just like changing only one set of units.  Just remember that all the units except the ones needed must cancel.

Change 3.40 m/sec to km/yr.

Notice that you must put the 60 sec in the numerator to cancel the sec you were given.  All units must cancel except the ones requested in the problem.  In this case, km/year.

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