What is Hooke's law? what is meant by elastic limit?
please answer me​

Hooke's law describes the elastic properties of materials only in the range in which the force and displacement are proportional. Hooke's law states that the applied force F equals a constant k times the displacement or change in length x, or F = kx. the maximum extent to which a solid may be stretched without permanent alteration of size or shape, is called elastic limit

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.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue