At 2:16 PM 2/19/5, Robin van Spaandonk wrote:
In reply to Horace Heffner's message of Thu, 17 Feb 2005 22:39:35 -0900:
Hi,
[snip]
That is true. A three body interaction close to Iapidus could produce a
lower energy collision. The third body might carry away much of the
momentum, as viewed from
Fairly nconsequential correction follows:
The collision velocity of the two initial impactors will be conservatively:
V = (2 G M/(R))^0.5
V = (2 G (4.7x10^20 kg)/(730 km))^0.5
V = 293 m/s
So the energy E converted to heat is:
E = 2 * .5 m*V^2 = (4.7x10^20 kg)(293 m/s)^2 = 4x10^25
In reply to revtec's message of Sat, 19 Feb 2005 11:23:31 -0500:
Hi,
[snip]
293 m/s is 649 mph! The heat of collision would be intense and localized
for planetary sized bodies. The 8.6 J/g, if correct, is not evenly
distributed. In the area of contact, billions of tons of material would be
At 12:32 PM 2/18/5, Robin van Spaandonk wrote:
In reply to Horace Heffner's message of Wed, 16 Feb 2005 01:13:26 -0900:
Hi,
[snip]
The velocity of collision of two bodies of mass and radius M, R, m and r
respectivley, is gravitationally bounded (on the low side) by
V = (2 G M/(R+r))^0.5 + (2
At 5:51 PM 2/16/5, Robin van Spaandonk wrote:
In reply to thomas malloy's message of Tue, 15 Feb 2005 22:56:48 -0600:
Hi,
[snip]
If a smaller and a larger sphere collided at just the right speed,
you might get a ridge line where they joined, and the resultant
object would not be spherical because
Richard C Hoagland was interview on C to C AM a few days ago. He
suggested that I read his paper on what Cassini found on Saturn's
moon Iapetus.
One of the tenants of natural philosophy is that straight lines,
square corners, and bisymmetries don't occur naturally. The straight
line in
In reply to thomas malloy's message of Tue, 15 Feb 2005 14:23:30 -0600:
Hi,
If a smaller and a larger sphere collided at just the right speed, you might
get a ridge line where they joined, and the resultant object would not be
spherical because the two spheres were different sizes. However it
Robin Von Spaandonk replied
In reply to thomas malloy's message of Tue, 15 Feb 2005 14:23:30 -0600:
Hi,
If a smaller and a larger sphere collided at just the right speed,
you might get a ridge line where they joined, and the resultant
object would not be spherical because the two spheres were
In reply to thomas malloy's message of Tue, 15 Feb 2005 22:56:48 -0600:
Hi,
[snip]
If a smaller and a larger sphere collided at just the right speed,
you might get a ridge line where they joined, and the resultant
object would not be spherical because the two spheres were different
sizes.
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