Yeah, I know...the nut fringe...
Were you referring to sound pressure, the way that the words sound, or something else?
Something else. When I said you didn't miss anything by not hearing the sound, I was referring to the snickering and giggling the jackasses that were doing the video were making while thinking just how gosh darn clever they were.
Well, matter can be neither created or destroyed (in our univers, anyway) so, (as I undertand...or misunderstand it), every action that converts energy to matter represents a loss of energy and a correspnding increase in the matter of the universe. Since it takes more energy to "reconvert" the matter to energy than it took to change it from energy to matter, the energy is lost to the system (entropy).
In the immediate "present", sometimes it would seemt to work the other way. If yoiu light a match, some of the mass of the match is converted to energy and the match becomes lighter and there is more energy around. But, there is an eventual cost of the energy.
On the nuclear level, once you convert a lighter element to a heavier one, through fusion, I'm not sure there'a a mechanism to convert it back. Are there "atom smashers" that have enough power to do it? Even if there is, it takes more power than you get back.
Presumably, within the realm of the elements of our universe, the materials will all go to the lowest energy state (represented by iron) and can go no further. But, we know that's not true because we know of at least two further levels; the neutron state (where the electrons, protons, neutrons and presumably all other particles are crushed together into a neutral state), and the black hole (where the compression is so great that nothing can escape to measure and thus may remain an enigma). I suppose it would be trite and foolish to think that the black hole is the endpoint of it but, from our perspective it may always be.
I suppose it's reasonable to surmise that the eventual fate of the universe (as we know it) will be when ALL the matter eventually succumbs to gravity and produces a massive black hole of the mass of the entire universe.
My prediction (safe, since I can't be
proven wrong) is that when that happens, it will trigger another explosion that will represent another "big bang". In other words, our universe is an oscillator (which may be the perpetual motion machine the dreamers dream of ...or, it may be something else entirely).
If it is an oscillator, then the whole concept of entropy may go out the window because all the energy comes back again in the next iteration of the universe.
Hmmmmm...but, if not ALL the energy comes back (damped oscillation), then, we must create a theory of where that energy goes to...........