Question
The distance between two successive crests of a certain transverse wave is 1.13 m. 20 crests pass a given point along the direction of travel every 18.6 s.
Calculate the wave speed. Answer in units of m/s.
So far I have gotten 1.22 for my answer by 20/18.6 x 1.13. I also tried 24.3 and that didn't work so I don't know what to do.
Calculate the wave speed. Answer in units of m/s.
So far I have gotten 1.22 for my answer by 20/18.6 x 1.13. I also tried 24.3 and that didn't work so I don't know what to do.
Answers
bobpursley
wave speed=distance/time=1.13/(18.6/20)
or
= 20*1.13/18.6 m/s
or
= 20*1.13/18.6 m/s
kate
That gives me the wrong answer according to the website
bobpursley
it is correct, wonder if they are counting 20 as one sig digit? Who knows.
Scott
do they start timing at a crest?
there are 19 wavelengths between 20 crests
there are 19 wavelengths between 20 crests