Someone pls rply quickly i dont have much time left

The equation that describes a transverse wave on a string is y = (0.0120 m)sin[(927 rad/s)t - (3.00 rad/m)x] where y is the displacement of a string particle and x is the position of the particle on the string. the wave is traveling in the +x direction. what is the speed v of the wave?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Explain the consequences of this addiction to the brain tissue