Physics
Physics, 28.08.2019 22:20, yadi64

If 27 j of work are needed to stretch a spring from 15 cm to 21 cm and 45 j are needed to stretch it from 21 cm to 27 cm, what is the natural length of the spring?

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If 27 j of work are needed to stretch a spring from 15 cm to 21 cm and 45 j are needed to stretch it...

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