The LEAST useful form of energy is Static Electricity however it to still find some uses.
Electricity.
Tsunami is useful to generate electricity.
You can move things with static electricity!
it preduses electricity
the thing that makes electricity such a useful form of energy is that electricity is renweable it comes from the skies "thunder" you can also generate electircity but still some things need electricity to help it generate. so......... electircity is a useful form of energy, but also wind, solar are also useful for of energy.
Useful: Energy Light Sound Non-Useful: Electricity C02
What makes electricity useful is that it is relatively easy to (a) transfer it over large distances, and (b) convert back and forth with other forms of energy.
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it uses electricity to create a magnet
In producing electricity
it uses electricity to create a magnet
One can calculate the cost of electricity by using several useful websites such as WebMath or Handy Math. Another example of a useful website is CSGNetwork.