cutlerbri06 cutlerbri06

22-04-2024
English

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In 2015, a team led by materials scientists Anirudha Sumant and Diana Berman succeeded in reducing the coefficient of friction (COF) between two surfaces to the lowest possible level—superlubricity. A nearly frictionless (and, as its name suggests, extremely slippery) state, ______ Which choice completes the text so that it conforms to the conventions of Standard English? Choose 1 answer: Choose 1 answer: (Choice A) reaching superlubricity occurs when two surfaces’ COF drops below 0.01. A reaching superlubricity occurs when two surfaces’ COF drops below 0.01. (Choice B) superlubricity is reached when two surfaces’ COF drops below 0.01. B superlubricity is reached when two surfaces’ COF drops below 0.01. (Choice C) when their COF drops below 0.01, two surfaces reach superlubricity. C when their COF drops below 0.01, two surfaces reach superlubricity. (Choice D) two surfaces, when their COF drops below 0.01, reach superlubricity. D two surfaces, when their COF drops below 0.01, reach superlubricity.

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