A heat engine works by carrying a working substance through a:

Question

Accepted Answer

B. Cycle

1. The substance must return to its start.
2. Only then can the process repeat.
3. So it follows a cycle.
_Source: OpenStax University Physics Volume 2, Chapter 4, The Second Law of Thermodynamics._

Answer

Cushion

Answer

Cable

Answer

Cavern

A heat engine works by carrying a working substance through a:

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