VOD - velocity of detonation
ANFO = ammonium nitrate
BTW,
"ANFO" = Ammonium Nitrate + Fuel Oil (commonly Diesel fuel)
Ammonium Nitrate is "deliquescent" -- it will absorb sufficient atmospheric moisture to dissolve into a liquid. aqueous solution.
A primary function of the (~7%) aded Fuel Oil is to stop the AN from absorbing water...
Thanks again!!
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...so much for today's chemistry lesson... '-)
TXnMA
P.S. & BTW: If you haven't done so, the "Interest/knowledge" 'bullet' (at right) on my FRProfile page might be worth reading...