Quote from DrEvil:
PV=nRT is a GAS law: http://en.wikipedia.org/wiki/Gas_laws
please don't try to apply it to steel!
The "metal creep" and melted steel theories don't hold up. The heat (or metal creep) would require to act on every single beam on every single floor of wtc7 instantaneously in order to create a sub 10 second neat vertical fall. In other words, every single support beam on every level of the building would have to be rendered non-existent within a second or less. The odds of fire/creep/fatigue achieving this level of symetry and sychronisiy are astronimically small. A melted/fatigued frame would result in a slow saggin of parts of the structure, perhaps it might eventually fall onto one side over hours/days, but it has never happened before so i doub it.
Yes I know it's a GAS law, but, the point is that Pressure is proportional to Temperature, and Volume is proportional to Temperature.
1. The Volume of metal increases with increasing Temperature, and in a Controlled environment, an increase in temperature causes an increase in pressure, that is why we have expansion of metals with increased temperature, or the bending of beams, because their movement is restricted. That results in an increase in Tension.
2. "Creep of metals" doesn't need every metal beam to fail. The jets hit at a point where the metal framework structure became weakened enough to cause the weight of the floors above to collapse downwards.
3. There was a sufficiently high temperature generated for a significant length of time with the applied stress, enough to be greater than 0.33Tm (i.e. 329 degrees centigrade) required for tertiary phase "Creep" and catastrophic failure.
4. Every material undergoes creep which is change in strain over time
THAT IS A FACT. It is science. You cannot dispute that .
5. What your suggesting is that for the "secondary creep" where
de/dt = K exp (-B/T), i.e. the slope of the stain time graph is too slow for this to happen between the time that the jets hit and the buildings imploded
and de/dt = Cs^n
where B, C, K and ne are particular for a metal
HOWEVER
Temperature in a closed environment can be 1000-2000 degrees centigrade i.e. a lot greater than 0.33Tm, and for an increased de/dt, the stresses would have also increased.
so what
1. The buildings imploded, and it happed because the structure failed.
2. The structure failed becasue the tertiary creep occured and this is associated with final catastrophic failure
3. The weight of the concrete and steel added to the stress that caused the cascading effect thus causing the implosion
this is a scientific explanation judging from what actually happened and the prevailing conditions
it is also natural for the human being to be sceptical and doubt the truth, because otherwise we wouldn't be human
and that explains why we are fallen, because all we want to do is poke holes into each other.
