Question: (a) When rinsing clothes with a given amount of water, would one find it more efficient to divide the water and rinse several times; or

(a) When rinsing clothes with a given amount of water, would one find it more efficient to divide the water and rinse several times; or should one use all the water in one rinse? Explain.
(b) Devise a clothes-washing machine that gives the most efficient rinse cycle for a fixed amount of water.

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