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*To*: "DML" <dinosaur@usc.edu>*Subject*: Re: extinction5*From*: "David Marjanovic" <david.marjanovic@gmx.at>*Date*: Sat, 31 Jan 2004 18:14:30 +0100*References*: <3.0.1.16.20030129214722.120f1dcc@pop1.attglobal.net>*Reply-to*: david.marjanovic@gmx.at*Sender*: owner-dinosaur@usc.edu

> If the specific gravity is 4 g/cm3 (what is too much according Mr > Marjanovic) Please note that I have no idea at all about the density of carbonaceous chondrites, or any meteorites for that matter. I was simply guessing that chondrites would contain much silicate, and I found in a textbook that glass had a density of 2.5 g/cm³. Well, I ignored the fact that those silicates are probably the silicates of heavier metals than the sodium of glass. > A well known example: The energy of the sunshine don't cause any > catastrophe on sailboats. It was same at Roman fleet, too. But Mr > Archimedes could set Roman boats fire at Syracuse with sunshine. He didn't > give any energy. He increased only the energy density of the sunshine with > his optics. A meteorite impact, however, is not a laser attack. It is the SMASHING of a rock on another rock. When the first rock is heavy and fast enough, then it will not simply burst in the impact -- it will evaporate and produce a crater. There is no doubt that a meteorite of 12 km in diameter has much more volume than many millions of A-bombs. Which seems to be what disturbs you so much. :-) > The maximum of the temperature in the first A-Bomb was around 2 million > Celsius therefore the maximum of the temperature of the extraterrestrial > object was around 3600 Celsius. Why "therefore"? > And Mr Marjanovic didn't count good because: > The volume of a sphere is 4*R^3*Pi/3 = D^3*Pi/6 > where ^ - power. > If D = 12 km then V is around 900 km3 and isn't 7,200. > In the equation of the energy can find the v (velocity) isn't V )volume) > therefore the magnitude of the amount of the energy isn't 10e41 J but 10e22. OK.

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

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