But is that true? Post the best feats of pure physical strength in comic books.
Rules:
1. You need to post scans. Just mentioning stuff doesn't count, because we need proof (there was that 'Lobo lifted the universe' rumor, for example)
2. No powerscaling feats. I mean no feats based on performance against other characters. 'This punch knocked back/hurt/killed this guy, who is crazy powerful so the punch is that powerful'. So just knocking out the Hulk or Superman doesn't count unless the strike also has some kind of measurable effect on something else. This is to prevent arguments about scaling different characters and such. Also, hyperbole statements like 'his/her strength is infinite' don't count. We need actual feats.
3. Any kind of physical feats are allowed: punching, kicking, lifting, throwing, thunderclapping, stomping, karate chopping, etc. It just has to be done with physical strength.
4. Amping is allowed. Captain Marvel or Black Adam using magic to amp up their punches is fine, as long as the feat comes from the actual impact of the punch. Characters who have temporary powerups are also allowed - we're looking for the best feat, not necessarily what feats are representative of a character at their typical levels.
I will submit this for my first entry: Bronze Age Superman physically destroys a pyramid that was able to survive unharmed within the Big Bang:
Superman bench pressing the earths weight for five straight days while deprived of sunlight and hardly broke a sweat trumps anything Hulk has ever done.
Graphite ("coal") is the thermodynamically stable phase of carbon under normal conditions (i.e. under ca. 1 atm pressure, 290 kelvin temperature). In other words, diamond would really, really like to transition to "coal" under everyday conditions -- the only thing preventing this is the exceptionally high activation energy associated with this process. Consequently, diamond is just a highly persistent, but metastable, phase of carbon. Diamond is like a river that is blocked by a dam; the water would like to get to the other side... but can't, since the activation energy for going over or through the dam is too high.
The most straight-forward way to bypass the activation energy would be to sublimate the diamond (sublimate, since carbon cannot be liquefied under normal temperatures and pressures) then allow it to deposit back to crystalline form, which would yield graphite. Superman could, of course, generate high enough temperatures to sublimate a diamond but there's one practical problem. If this is done under oxygen-containing atmosphere, the hot carbon vapor quickly converts to CO2 before it can form graphite again. Superman would need to somehow produce oxygen-free reaction conditions...
Graphite isn't coal. As in, I know you put coal in quotation marks, but their crystalline structure is completely different. Coal isn't pure carbon, anyway.