A.波的传播方向一定向右 |
B.波的周期可能为0.5s |
C.波的频率可能为5.0Hz |
D.波的传播速度可能为9.0m/s |
A.v变小,a变大 | B.v变小,a变小 |
C.v变大,a变大 | D.v变大,a变小 |
A.t=0.1s | B.t= 0.2s | C.t>0.2s | D.0.1S<t<0.2s |
A.v=1m/s,t=0s | B.v=1m/s,t="6" s |
C.t="1s," 波向x轴负方向传播 | D.t="5s," 波向x负方向传播 |
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