+A thermodynamic cycle guides a system through a series of states, beginning and ending at the same point. During this journey, a [Heat Engine](/wiki/heat_engine) can convert [Heat](/wiki/heat) into useful work, or vice versa, demonstrating the fundamental principles of energy transformation.
+## See also
+- [Thermodynamics](/wiki/thermodynamics)
+- [Work](/wiki/work)
+- [Energy](/wiki/energy)
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