Wednesday 28 September 2011

WHAT is Dimensional Analysis!?

Dimensional Analysis: is the technique of converting between units! There are only 4 basic steps to solving a problem using Dimensional Analysis
Steps:
  • Find the unit equality
  • Find the conversion factor
  • Apply conversion factor
  • Cancel units    
Now FOLLOW these easy steps to solve the problems. Here are step-by-step examples :)


  • How many inches are in 250 centimeters?

                1 in= 2.54cm

         d= 250cm x   1 in   
                              2.54cm
    
         d= 98.4 in


  • How many dollars is E35.00? 
                   1E=$1.4

       35E x $   1.4  =$49.00
                       1
  • What is 100 km/h in miles/hour?                 
     100  km   x   1mi    = 62.5 mi/h
               h        1.6km

If u still don't understand this concept... Here's a quick video that will show how to do Dimensional Analysis..  :)




Unit Equality is also very important... Unit equality is the starting point for solving the problem. A unit equality is an equation that shows how different units are related.