Time travel discussions are permitted in the Physics Forums, specifically in the relativity sub-forum. New members are encouraged to search for existing threads before posting to avoid redundancy. Many previous discussions on time travel have devolved into speculation, which is not allowed according to forum guidelines. Members are reminded to adhere to these rules to maintain the quality of discussions. Engaging in informed, guideline-compliant conversations about time travel is welcomed.
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secocarmona
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i´m new in this fisics forum but, i would like tomake some questions about time travel...is there any specific place to put that kind of questions?
Before you do that, please do a SEARCH first. We have had TONS of such threads already, and I don't think we need another one. Take note as well that many of these threads often deteriorate into speculative guess work, which is against our Guidelines.
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...