JEE Advanced 2021 Full Test 3 Paper 1

A plane longitudinal wave of angular frequency 1000Hz is travelling along positive x - direction in a homogeneous gaseous medium of density P=1kg∕m3. Intensity of wave is I=10−10w∕m2 and maximum pressure change is (ΔP)max=2×10−4N∕m2. Assuming at x=0 initial phase of medium particles to be zero, choose the equation of the wave.