Discussion
Young's modulus is the property of
Answer: D
Young's modulus is a property of solids only.
\[Y = \frac{\text{longitudinal stress}}{\text{longitudinal strain}}\] It measures resistance to a change in length, and only a solid has a definite length to change. Fluids have no shape of their own and so have no Young's modulus or rigidity modulus; they do have a bulk modulus.
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