What is a complex machine that burns fuel to produce thermal energy and then uses the thermal energy to do work?

What is a complex machine that burns fuel to produce thermal energy and then uses the thermal energy to do work?

  • Correct Answer: battery
  • vapor engine
  • convection oven
  • combustion engine

Explanation: A combustion engine is a complex machine that burns fuel to produce thermal energy and then uses the thermal energy to do work. Combustion engines may by external or internal combustion engines, depending on where the fuel is burned.

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