Physics Unit9: Static Equilibrium, Elasticity and Fracture (id: de498b990)

本题目来源于试卷: Physics Unit9: Static Equilibrium, Elasticity and Fracture，类别为 通用国际物理

[单选题]
Strain is

A. the ratio of the change in length to the original length.
B. the stress per unit area.
C. the applied force per unit area.
D. the ratio of stress to elastic modulus.


参考答案:  A


本题详细解析: 暂无

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