Reducing friction: practical
Lesson 10 / 10
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Lesson outcome
I can collect data to test the effectiveness of different lubricants, taking steps to ensure a fair test.
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Lubricants are substances added between two surfaces to reduce the friction between them.
In a fair test, only the variable we are testing is changed.
In a fair test, everything we are not testing is kept the same for every measurement.
Repeat measurements help check for anomalous results.
A mean combines repeat measurements into a single result.
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This content is by Cashar and published under an open licence.