Section 21.1 | - Explain how an external combustion engine works.
- Compare a steam engine to a steam turbine.
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Section 21.2 | - Tell how an internal combustion engine works.
- Define four-stroke and two-stroke engine cycles.
- Describe the purpose of a crankshaft.
- Identify differences among various engines.
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Section 21.3 | - Examine how electric motors are used to power locomotives.
- Discuss how a hybrid automobile is powered.
- Summarize the advantages and disadvantages of hybrid and fuel cell cars.
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