output from a pressure monitor mounted at a point along the path taken by a sound wave of a single frequency traveling at 343 m/s through air with a...

output from a pressure monitor mounted at a point along the path taken by a sound wave of a single frequency traveling at 343 m/s through air with a uniform density of 2.01 kg/m3. The vertical axis scale is set by Δps = 4.10 mPa. If the displacement function of the wave is written as s(x, t) = sm cos(kx - ωt), what are (a)sm (in nm), (b)k, and (c)ω? The air is then cooled so that its density is 2.05 kg/m3 and the speed of a sound wave through it is 321 m/s. The sound source again emits the sound wave at the same frequency and same pressure amplitude. What now are (d)sm (in nm), (e)k, and (f)ω?