THE INTERNET PLASMA PHYSICS EDUCATION EXPERIENCE

Stored Energy Home Experiment Calculation

QUESTION: How hot will 2 cups of water get from 2 minutes in a microwave oven?

If you know the units of conversion factors, and that anything divided by itself is equal to 1, with a little common sense you can figure out a lot.

(If you want more explanation of this technique, here's a simple example of canceling units.)

Here are your facts:


                                     Joules
     Specific Heat of Water = 4180 -----------
                                   Kg - Deg. C

     Power of Microwave = 750 Watts

             Joule
     Watt =  ------
             Second

     Weight of Water = 0.454 Kg

     Time of Heating = 120 Seconds

Write an equation so the units cancel and you are left with degrees C.

Try it yourself first; here's one way to do it. Here's a more complete explanation!

Simple explanation of canceling the Units.

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