Efficiency, Sankey diagrams, and work done

Calculate energy efficiency as the ratio of useful output energy to total input energy, construct and interpret Sankey diagrams, and calculate work done using work = force × distance

Usually learned at ages 12–13

Builds on: Energy can't be created or destroyed, Resultant Forces (helps), Calculating Percentages (helps)

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On the map from: Marble Skill Taxonomy (v1), © Generative Spark, Inc. (withmarble.com), text CC BY-SA 4.0, database ODbL 1.0: https://github.com/withmarbleapp/os-taxonomy