Question

The displacement `y` of a partcle in a medium can be expressed as,
`y = 10^(-6) sin ((100t + 20x + (pi)/(4))m` where `t` is in second and `x` in meter. The speed of the wave is
A. `2000m//s`
B. `5m//s`
C. `20m//s`
D. `5pim//s`

Answer 1

Correct Answer - B
`v=(co-efficent of t)/(co-efficent of x)=(omega)/(k)=(100)/(20)=5 m//s`