EFFICIENCY. By: Amanda Koon St. Robertâ€™s Catholic High School. The Law of Conservation of Energy. Energy is neither created nor destroyed . It changes from one form to another . We can use energy path diagrams to illustrate energy transformations into both useful and wasted forms.
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By: Amanda Koon
St. Robert’s Catholic High School
What is the efficiency of this light bulb?
What is the efficiency of a crane that uses 5.10 x 105 J of energy to lift 1000 kg a vertical height of 32.0m?
A particular light bulb is known to be 7.5% efficient.
In general, the greater number of steps in transferring energy, the less efficient the process. Why is this so?