问题补充:
See the picture of the wave at some time,and we know that the direction of velocity is rightvelocity of the wave V=5m/s,Find:(1)、How much swing(振幅) of the wave is?(2)、 How much wavelength of the wave
答案:
1.Swing is 2m
2.Wavelength is 8m
3.frequency is 5/8 period is 8/5
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