Re: [-empyre-] delineations

["Aliette Guibert" <guibertc@criticalsecret.com>]

Here is exactly what it remains to make: right now


----- Original Message ----- 
From: "Henry Warwick" <henry.warwick@sbcglobal.net>
To: "soft_skinned_space" <empyre@gamera.cofa.unsw.edu.au>;
"soft_skinned_space" <empyre@gamera.cofa.unsw.edu.au>
Sent: Thursday, April 07, 2005 4:54 AM
Subject: Re: [-empyre-] delineations


> The Voices in my Head tell me that on 4/6/05 2:19 PM, Kate Southworth at
> katesouthworth@gloriousninth.com wrote:
>
> > I do agree in particular with the points made by
> > both Aliette and James that concern the need to articulate the different
> > definitions of transgression and indeed of transcendence.
>
>
> Impact Effects
>
>
> Your Inputs:
> Distance from Impact: 4830.00 km = 2999.43 miles
> Projectile Diameter: 40233.50 m = 131965.88 ft = 24.99 miles
> Projectile Density: 3000 kg/m3
> Impact Velocity: 20.00 km/s = 12.42 miles/s
> Impact Angle: 90 degrees
> Target Density: 2500 kg/m3
> Target Type: Sedimentary Rock
>
>
> Energy:
> Energy before atmospheric entry: 2.05 x 1025 Joules = 4.89 x 109 MegaTons
> TNT
> The average interval between impacts of this size somewhere on Earth
during
> the last 4 billion years is 3.2 x 10^9years
>
>
> Major Global Changes:
> The Earth is not strongly disturbed by the impact and loses negligible
mass.
> The impact does not make a noticeable change in the Earth's rotation
period
> or the tilt of its axis.
> The impact does not shift the Earth's orbit noticeably.
>
>
> Crater Dimensions:
> Transient Crater Diameter: 228 km = 141 miles
> Transient Crater Depth: 80.5 km = 50 miles
>
> Final Crater Diameter: 464 km = 288 miles
> Final Crater Depth: 1.88 km = 1.17 miles
> The crater formed is a complex crater.
>
> The volume of the target melted or vaporized is 182000 km^3 = 43700
miles^3
> Roughly half the melt remains in the crater, where its average thickness
is
> 4.47 km = 2.78 miles
>
>
> Thermal Radiation:
> The fireball is below the horizon. There is no direct thermal radiation.
>
>
> Seismic Effects:
> The major seismic shaking will arrive at approximately 966 seconds.
> Richter Scale Magnitude: 11.1 (This is greater than any earthquake in
> recorded history)
>
> Mercalli Scale Intensity at a distance of 4830 km:
>
> IV. Felt indoors by many, outdoors by few during the day. At night, some
> awakened. Dishes, windows, doors disturbed; walls make cracking sound.
> Sensation like heavy truck striking building. Standing motor cars rocked
> noticeably.
>
> V. Felt by nearly everyone; many awakened. Some dishes, windows broken.
> Unstable objects overturned. Pendulum clocks may stop.
>
>
>
> Ejecta:
> The ejecta will arrive approximately 1520 seconds after the impact.
>
> (HW Note: you are 3000 miles away, which means the ejecta will be
travelling
> at nearly 2 miles per second, which is hypersonic 7200 mph)
>
> Average Ejecta Thickness: 21.3 cm = 8.38 inches
> Mean Fragment Diameter: 113 micrometers = 4.46 1/1000 of an inch
>
> (HW note: So, you will experience a field of red hot rocks 8 inches across
> travelling at 7200 mph...)
>
>
> Air Blast:
>
> What does this mean?
>
> The air blast will arrive at approximately 14600 seconds.
> (HW Note: approx, 4 hours later)
>
> Peak Overpressure: 77800 Pa = 0.778 bars = 11.1 psi
> Max wind velocity: 142 m/s = 318 mph
> Sound Intensity: 98 dB (May cause ear pain)
> Damage Description:
>
> Multistory wall-bearing buildings will collapse.
>
> Wood frame buildings will almost completely collapse.
>
> Glass windows will shatter.
>
> Up to 90 percent of trees blown down; remainder stripped of branches and
> leaves.
>
>
> http://www.lpl.arizona.edu/impacteffects/
>
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>
>