Question: Consider the following systems and how closely each approximates a reversible process. Rank them from approximately reversible to irreversible with greatest change in entropy. Consider

Consider the following systems and how closely each approximates a reversible process. Rank them from approximately reversible to irreversible with greatest change in entropy. Consider a video of each in reverse.
(a) A child swinging on a swing
(b) Mars orbiting the Sun
(c) Making a milkshake in a blender
(d) A yo-yo climbing up its string

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