The length form first rarefaction to the last rarefaction=21cm
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A wave is travelling along a slinky spring.The wavelength is 10.5cm.If a compression takes 1 second to travel form point A to B.What is the frequency of the wave?
更新1:
My calculation: Waves Speed=distance/time=0.21m/1s=0.21ms-1 Frequency=Wave Speed/wavelength=0.21/10.5=0.02Hz BUT THE ANSWER IS 2.0Hz why? When should we use cms-1 and when use ms-1.
更新2:
(p.14)A water wave of frequency 10Hz has a wavelength of 1cm.What is its speed? Wave speed=frequency x wavelength=(10)(0.01)=0.1ms-1 Correct