To make more sense of this, the International Tennis Federation, the game's law-makers, have produced a chart which simply matches the coefficient of friction (friction) and coefficient of restitution (bounce) to produce a court pace rating.
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The result is a tough material that has a low coefficient of friction comparable to that of Teflon and is highly resistant to abrasion.
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The virality of a messaging platform equals its emotion-friction ratio, and the Snapchat paradigm maximizes this virality coefficient.
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