A progressive wave is given by
`y=3 sin 2pi [(t//0.04)-(x//0.01)]`
where x, y are in cm and t in s. the frequency of wave and maximum accelration will be:
A. `100 Hz, 4.7 xx 10^(3) cm//s^(2)`
B. ` 50 Hz, 7.5 xx 10^(3) cm//s^(2)`
C. `25 Hz, 4.7 xx 10^(4) cm //s^(2)`
D. ` 25 Hz, 7.4 xx10 ^(4) cm//s^(2)`
