Ujiro, Easy's last posts are sourced in the controversial Levante Labs study that has been discussed in this thread.
Easy, as per this paper:
https://oa.doria.fi/bitstream/handle...pdf?sequence=1
Ed = Cv * V is an equation for tissue PENETRATION and is therefore inapplicable to this situation.
I'd also like to note that unlike the paper I just linked to, the Levante Labs study has zero references. I'm just lucky that a google search was able to turn up more information about that equation or we would still be scratching our heads about where that equation came from.