12-28-2021, 02:52 PM
Our bag is not blown up and a very small increase of the air volume inside it ΔV ≈ (Δp/p)V = 0.03 V does not increase the pressure inside (Δp=30hPa, p=1000Pa). Only a small peak when the bag adopts the new volume (its mass is not zero!) will appear. When I hit the bag with some air inside I observe a single sharp peak of about 1hPa (see the figure).
The origin of multiple peaks is still unclear.
The origin of multiple peaks is still unclear.