[ExI] 3 kt?

Dylan Distasio interzone at gmail.com
Fri Aug 7 00:36:43 UTC 2020

Thanks for sharing.  Based on who would gain (or not) in such a tragedy, I
had assumed the ammonium nitrate claim was likely accurate.  An attack from
any obvious players doesn't seem in anyone's interest.

I have to admit as a layman though that it looked like it could have been a
~200K ton nuke when first watching the footage based on the cloud and blast
radius.  I'm glad of course that doesn't appear to be the case.

On Thu, Aug 6, 2020, 7:40 PM spike jones via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> Such a grim topic it is, that huge explosion in Beirut.
> When I was in engineering school, we had a compressible flow class where
> they had us do all these calculations on blast radius, overpressure
> threshold, shock wave mechanics and so forth.  The cold war was still going
> in those days, so they thought it was a good thing for us to know about.
> My compressible-flow book went into a lotta gory detail on what happens
> behind a shock wave and how to figure out what it was that exploded based
> on the velocity of the shock wave (which isn’t the same as a leading-edge
> sound wave (because the shock wave travels in a compressed medium and sound
> waves do not (so the shock wave gets to ya first (and hurts a lot worse.))))
> If we go with a cell-phone frame rate of about 30 per second, and estimate
> the shock wave was advancing at about 100 meters between frames, that is a
> shock wave velocity indicating ammonium nitrate, which supports the theory
> that it was a coupla thousand tons of fertilizer on a parked ship, possibly
> three thousand tons.  Oy vey mercy.
> spike
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