Answer:
Frequency is 0.5 Hz and the wave speed is 10 m/s.
Explanation:
As we know that frequency is defined as the how many times the no of cycles repeat in one second so if the wave is vibrating up and down twice during 1 second then the frequency in 1 second is
[tex]f=\frac{1}{2} hz\\F=0.5hz[/tex]
Therefore frequency is 0.5 Hz.
Now the distance of wawe in each second is,
[tex]d=20m[/tex]
Now the wave velocity is,
[tex]v=fd[/tex]
Here, f is frequency, d is the distance, v is the wave velocity.
Substitute all the variables
[tex]v=0.5\times 20\\v=10m/s[/tex]
Therefore the wave speed is 10 m/s.
