English Language · English
Which choice completes the text so that it conforms to the conventions of Standard English? 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, ______
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1superlubricity is reached when two surfaces' COF drops below 0.01.✓
- 2reaching superlubricity occurs when two surfaces' COF drops below 0.01.
- 3two surfaces, when their COF drops below 0.01, reach superlubricity.
- 4when their COF drops below 0.01, two surfaces reach superlubricity.
Correct answer
superlubricity is reached when two surfaces' COF drops below 0.01.
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