本题目来源于试卷: Physics Unit11: Vibrations and Waves，类别为 通用国际物理
[单选题]
Doubling only the spring cows4x9.*uu sluni089xf p(u g ski;bt1pstant of a vibrating mass-and-spring system produces what effect f pgiu x1(;9kt i0pbs8on the system's mechanical energy?
A. increases the energy by a factor of two
B. increases the energy by a factor of three
C. increases he energy by a factor of four
D. produces no change
参考答案: A
本题详细解析:
暂无
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