Know about thermal expansion and practical expansion of thermal expansion in our day to day life. Also know about the physics of thermal expansion.
Thermal expansion, that causes a nearby building to collapse 6 hours after the towers went down, exists in the minds of humans only. Was WTC7 struck by a directed energy weapon too? Or was there something left of it afterwards? Which of course would be different than the towers. There was very little left of them. They dustified real good.
Flexible hose connector assemblies are used on equipment and coil connectors. It compensates for the lateral movement & vibration and also helps in accommodating thermal expansion & contraction of the piping system.