Let us say that I have the following things:
- a tube with a cross section of 1 cm²
- a highly sophisticated moving forcefield generator
- an energy source
- a switch
Now I put these things together in a way that if I pull the trigger (the switch) I get a forcefield moving down my pipe at, say, Mach (1 Mach (I think) = speed of sound) 2. It keeps going until it has moved 1 cm. The resulting shockwave travels down the remaining 5 cms of pipe, and exits at the end. Let us say that there is an average person standing 1 m away, in the direction the gun is pointing. What happens to him?
If nothing happens, how much air do I need to move to E.G. knock him over/out?
I am adding the biology tag because of the knocking-out of a human.