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Glossary of pump terms: Y

Y-axis: The vertical axis in the Cartesian coordinate system.

Yield point: The point of transition for a metal when it goes from an elastic material (returns to its starting shape) to a plastic material (does not return to its starting shape).

Young's modulus: The measure of the stiffness of an elastic material. Defined as the ratio of the stress along a particular axis over the strain along the same axis.

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