|
math I've used
1/4 steel ball
avg weight of steel being 7.8g/cm3
6.35mm/2=3.175
(that's pi, not a crazy n) 4πr=126.68mm3
126.68mm3=.126cm3
7.8/.126=.982g
.982@150fps=1.02j
So they seem to have dropped the high impact requirement for glasses altogether, since Z87.1 alone is 1j
aaaaan re-edited a bunch of numbers because I was using the high end of steel weight instead of the average. Dropped everything .1-.2j
Last edited by ThunderCactus; March 6th, 2015 at 22:32..
|