« on: 13/08/2022 12:17:10 »
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The underlying hypothesis is that old stuff gets buried by new stuff. But that new stuff must have come out of the ground from somewhere else. So where are the holes from which came the stuff that buried the ice age?Do the holes include volcanic craters?
My malfunctioning engineering brain viewed the two frames as being sufficiently similar as to consider them equivalent.As @Halc points out, Penrose is taking a presentist view and a Newtonian one at that. I think he is trying to show how the man in the street might view it by assuming the 2 participants share a common present - and in everyday life it is a good approximation.
I just noticed this morning that "eternal student" has been crowned with the regal title "naked science forum king", a most auspicious honour that he(she) did not desire.I think he views it more as a suspicious honour
Regardless of that, why did I not receive an invitation to the coronation ceremony and the subsequent food and drink debauch?The peasantry are not usually invited to these events. Itís only people like Alan who are sufficiently skilled at dťbauching - it takes years of dedicated practice
Ö.but these are proper ads, would these be classed as spam?The rules here expressly forbid unsolicited advertising, so yes we view them as spam
Perhaps you're still convinced that movement needs a time dimension to facilitate it but are unwilling to stand up for your conviction.That depends what you mean by dimension and what you mean by facilitate.
The idea that there is a past, present and future is speculation when all we know is the present. I remember where objects were before they moved (past), and I can predict where objects will be after they move (future) but memory and prediction of movement is far from being evidence of a time dimension. This is a mistake and one that is rearly admitted.Iím not sure who you think rarely admits it. I would agree if you are talking about the general population, but physicists (and philosophers) frequently debate this area. Your view is a form of temporal presentism, but there are many other options including block universe. So, you have nailed your colours to a particular wall, some would agree with you, but there are others who would say you are wrong to do so.
ÖÖ.as long as you remember they are just imaginary.Imaginary has a different meaning in physics to common usage. It does not equate to not real, as in unicorns are not real.
If you can devise an experiment that will provide unequivocal empirical evidence of your idea, then you will be in line for a Nobel prize. The reason there is so much debate and varying views in this area is because there is no empirical evidence.I understand you for some reason don't like that time is a dimension,Pesky empirical evidence.
I want to meet you at Joe's in 10 unicorns, of course we will have to set up a convention for one unicorn like the swing of a pendulum or the movement of the sun, however we won't need to set up a convention for the spatial dimensions because they actually exist and we can measure them directly.As Origin points out, you are confusing units with dimensions.
I know my dna remains the sameI wouldnít be so sure about that. DNA does mutate as it passes from cell to cell and we age.
For instance, will any of the original heart I was born with remain with me now?I would say not a lot, if any, of the original cells. Usual quoted cell replacement is between 7 & 10 years, but can be shorter for important organs.
But Lambda can be copied like we cannot, so if I were to ask it any questions, I'd pose my queries along those lines: What if you were copied? What if two copies were somehow merged? What if you were 'moved' to new faster hardware? Would the old hardware fear being turned off still?Thatís an interesting one. It echoes the question raised in Star Trek, does a transported person die on disassembly and be reborn at the other end. Certainly cloning to new hardware and then turning off should mean death to the old AI.
Bored chemist, much as I hate to do this, you are in error. I have it on good authority that there is only one unicorn. Hence the correct expression is "the unicorn did it". I don't have to remind you of the rigour needed in all such scientific matters, correct units, correct dimensions and of course correct unicorn.Please state your authority.
@Colin2B I'm not certain what you're trying to say there.Sorry, I was in too much of a hurry to expand.
No, anything does not go.Why do we have to be subjected to such juvenile garbage on a science site???It's the "Just Chat" section of a science sight. Anything goes, as the description pretty much states.
Also, I do for some levity.Levity is one thing, but you often use this section for posts in bad taste and/or of a sexual or crude nature. Thatís not what this section (or any other) is for.
Also, if those videos are publically accessible, I'd be interested in seeing them.You might also be interested in the rest of the site https://jila.colorado.edu/~ajsh/bh/schwp.html#geometry
Perhaps the moss I have been examining has been to dry.They can become dormant and difficult to see if too dry. Try soaking the moss overnight then look at it with a hand lens - best with top or side lighting (try both) against a dark background.
Hi.Chladni also saw this effect on very fine particles, Faraday thought it was due to air currents carrying the particles around.The patterns formed on Chladni plates are a result of the properties of the plates themselves, and has nothing to do with the sand/salt/sugar/dust/etc. placed on top for visualization purposes.Almost entirely true.
If you get silly and start using extremely fine grained powders you sometimes do get alternative patterns forming.
Is it better to air seal our food or simply put it in the freezer?Both
The patterns formed on Chladni plates are a result of the properties of the plates themselves, and has nothing to do with the sand/salt/sugar/dust/etc. placed on top for visualization purposes. ..... The pattern that the nodes make is a function of the frequency of the vibration and the size/shape of the plate.Fully agree, acid test is that the pattern changes with frequency, so there is no memory effect.
....we did all just step around the possibility that if you push the frequency of the gamma ray higher then we could get outside the range of energy that most of the current scientific theories work with.As this is informal, otherwise much would go into new theories, although the new theorists proposing these ideas are orders of magnitude brighter than the ones we get here. There is interesting work being done at CERN, some on photon/photon collisions which donít happen at low energies. Some work on questioning whether high energies might reveal extra dimensions via Kaluza-Klein states, or might reveal gravitons which wouldnít be detected, but could be lost into the extra dimension leaving an energy momentum imbalance.