The discussion centers on the philosophical implications of existence in physics, particularly regarding entities that lack mass and volume, such as massless particles. Participants explore the definition of physical existence and how it relates to concepts in ontology. The conversation highlights the tension between physical reality and abstract concepts in physics. There is a call for adherence to forum rules regarding philosophical discussions. The inquiry raises fundamental questions about the nature of existence itself in the context of modern physics.
#1
wittgenstein
222
7
If something hat has no volume and no mass can exist ,what does it mean to say that something physical exists?
Do we even know? My understanding of dark energy is that particles come into existence, exert and outward force, then vanish. My problem with that is how, of course, then how does dark energy know to push everything in the same direction? The pressure exerted would be in all directions, even if the space was moving so why isn't stuff pushed all over the sky?
Thanks - rev
I think it's easist first to watch a short vidio clip
I find these videos very relaxing to watch .. I got to thinking is this being done in the most efficient way?
The sand has to be suspended in the water to move it to the outlet ... The faster the water , the more turbulance and the sand stays suspended, so it seems to me the rule of thumb is the hose be aimed towards the outlet at all times .. Many times the workers hit the sand directly which will greatly reduce the water...