Question

For a wave displacement amplitude is 10^-8m , density of air 1.3 kg m^-3 velocity in air 340 ms^-1 and frequency is 2000 hz. the intensity of wave is

a.5.3 x 10^-4 wm^-2
b.5.3 x 10^-6 wm^-2
c.3.5 x 10^-8 wm^-2
d.3.5 x 10^-6 wm^-2