Examlex
A steel guitar string with a diameter of 0.300 mm and a length of 70.0 cm is stretched by 0.500 mm while being tuned.How much force is needed to stretch the string by this amount? Young's modulus for steel is 2.0 × 1011 N/m2.
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Reference Group
A reference group is a social group that an individual uses as a standard for evaluating their own behavior, values, and attitudes.
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