Alexandr A.Shpilman (alexandrshpilman78@gmail.com )
History of the Moon
To what maximum temperature can heat up freely
falling stone when hitting the surface of the Moon?
Obviously, it will be to identify potential
energy stone in the gravitational attraction of the Moon:
U = g*M*m/R
Where
g - the gravitational
constant,
M - the mass of the Moon,
R - radius of the Moon,
m - mass of stone.
If the heat capacity of the stone material C ~ 700 J / kg * deg,
the maximum possible temperature of the fallen stone:
T = g*M/(R*C) ~ 4000
degrees Celsius.
If we consider that the impact energy goes on
heating of the ground surface Moon, we can put something that survive from the
stone may heat up to 2000 degrees Celsius or more. This melting temperature
aluminosilicates.
So we can assume the following:
Once upon a time the Earth was surrounded by
stone-dust rings like Saturn. Gradually, gravitational attraction is the
beginning pieces of pull rings in friable clumps, which attracted coalesced
into a larger lump. When the gravitational potential of the lump became
sufficient for sintering and then melted colliding fragments of rings, thick
crust began to form on the surface of the clot.
As a result, when seismic shocks Moon is rings
like a stone sphere with a loose contents. A gravimetry shows a plurality of
individual solid "lumps" in its interior.