marpinator
27.07.2021 •
Physics
11. A load of 20N on a wire of cross-sectional area 8 x 10"m”, produces an extension of 104m. m. Calculate Young's Modulus for the material of the wire if its length is 3m. 4. 7.0 x 10''Nm2 B. 7.5 x 10''Nm2 C. 8.5 x 10''Nm2 D. 9.0 x 10''Nm-2 y 10l-2 YA
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Ответ:
friction reduces the efficiency of machines, thus we must reduce the friction force that is acting upon it.