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物理水波问题大神进Wavesonalaketravelnorthat1.5m/s.Thespacingbetweenwavecrestsis1.2m.Whatisthefrequency?Aboattravellingsouthat10km/hmovesupanddownasitpassesthroughthewaves.Withwhatperiod?
题目详情
物理水波问题 大神进
Waves on a lake travel north at 1.5 m/s. The spacing between wave crests is 1.2 m. What is
the frequency? A boat travelling south at 10 km/h moves up and down as it passes through
the waves. With what period?
Waves on a lake travel north at 1.5 m/s. The spacing between wave crests is 1.2 m. What is
the frequency? A boat travelling south at 10 km/h moves up and down as it passes through
the waves. With what period?
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答案和解析
湖中水波以1.5 m/s向北传播.相邻波峰间距1.2 m,求问频率?一艘船以10 km/h速向南行驶,并随着水波上下晃动,求问频率?
波长=1.2m,频率=波速/波长=1.25Hz.
10km/h=10000m/3600s=2.8m/s,
水波相对于船的速度=1.5+2.8=4.3m/s,
频率=波速/波长=3.58Hz.
波长=1.2m,频率=波速/波长=1.25Hz.
10km/h=10000m/3600s=2.8m/s,
水波相对于船的速度=1.5+2.8=4.3m/s,
频率=波速/波长=3.58Hz.
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