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Thermal energy.
Turbines spin generators that produce electrical energy.
When there is a heat differential between its ends
A generator. It uses the heat energy from burning gasoline or a similar fuel.
A thermocouple does this, but a turbine does also.
These are called "thermocouples".http://en.wikipedia.org/wiki/Thermocouple
You don't, a thermocouple's output is in the millivolt range.
A thermocouple uses the thermoelectric effect to do what it does. Thermal energy (heat) is converted into a difference of potential, which is electric (electromagnetic) energy.
Calories don't "produce" energy; calories are a UNIT OF ENERGY.
Computers do not produce energy, they use/consume energy.
Thermal energy.
The sun produce light and nuclear energy
a Thermocouple
Thermocouple
Turbines spin generators that produce electrical energy.
When there is a heat differential between its ends
it give kinetic energy