Reversibility in cars isn't about driving backwards. An informative YouTube video describes how the degree of reversibility in a system determines its efficiency. It explains the concept using an example of the pistons in a car engine and how they revert to their original positions.

Concepts

engineering design, engines, heat, work, energy, technology resources

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Instructional Ideas

• Provide cloze notes for viewers to fill in as they watch the video
  

Classroom Considerations

• Understanding how car engines work would be a huge plus
• Learners should be familiar with conservation of mass and energy from the previous video (this is the eighth video in the Crash Course Engineering series)
  

• This video is hosted on YouTube

Pros

• Explanations are thorough and easy to follow
  
• Animations help aid understanding—and are interesting, too!
  

Cons

• None