第3题
杨氏弹性模量E仅决定于材料本身的性质,而与外力ΔF,物体的长度L以及截面积S的大小无关,它是表征固体材料性质的一个重要物理量。 Young's modulus of elasticity e is only determined by the properties of the material itself, but has nothing to do with the external force Δ F, the length L of the object and the cross section product S. It is an important physical quantity to characterize the properties of solid materials.
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