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*To*: dinosaur@usc.edu*Subject*: Re: extinction5*From*: Graydon <oak@uniserve.com>*Date*: Sun, 25 Jan 2004 13:49:26 -0500*In-reply-to*: <3.0.1.16.20030125054825.617f4990@pop1.attglobal.net>*References*: <3.0.1.16.20030125054825.617f4990@pop1.attglobal.net>*Reply-to*: oak@uniserve.com*Sender*: owner-dinosaur@usc.edu

On Sat, Jan 25, 2003 at 05:48:25AM +0000, Simonyi scripsit: > The energy of the extraterestrial object is > E = m*ve2/2 > m = s*V > where m - mass, e- exponent, v - velocity, s - specific gravity, V - volume. > > If we want to count the density of the energy then > V = 1 m3 > If > s = 2 g/cm3 = 2,000 kg/m3 This is a low value for specific gravity for a carbonaceous chondrite. > v = 5,000 m/s This is impossible. It can't possibly be less than escape velocity, 11 km/s, minus the rotational velocity of the Earth. 5 km/s is half that minimal velocity, which puts you more than a factor of four low. Given that your specific gravity is a factor of two or more low, you're an order of magnitude off in your energy density calculation. > then > E = 2*10e3*25*10e6/2 = 2.5*10e6 KJoule/m3 > > The density of the energy of the first A-Bomb was around 1 billion times > bigger than the density of energy of the extraterestrial object. Well, yes, but you're comparing apples to kumquats -- we don't really care about energy density, we care about energy delivered. That is what has been calculated to exceed the energy delivered by setting off the whole nuclear arsenal. -- oak@uniserve.com | Uton we hycgan hwaer we ham agen, | ond thonne gedhencan he we thider cumen. | -- The Seafarer, ll. 117-118.

**Follow-Ups**:**Re: extinction5***From:*"David Marjanovic" <david.marjanovic@gmx.at>

**References**:**extinction5***From:*Simonyi <huibm012@attglobal.net>

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