geordief

As in "cui boner" ? (it got a laugh last time) https://www.scienceforums.net/topic/99493-trumps-denial-of-groping/?do=findComment&comment=949472 Once I was kept in a prison for a few days as an irregular economic migrant. I was taken aback when the first thing I was offered was a magazine that was obviously designed to keep me moist and docile.(they also removed my belt if I recall correctly all these years later)

Caveat ejaculator https://edition.cnn.com/2021/06/10/media/jeffrey-toobin-returns-cnn/index.html Let Toobin be a warning to those who might masturbate in public. He says he thought it was a private activity .... Mind you Trump's and Barr's public exposure of their abuse of the Justice Department's procedures in going shamelessly after his political opponents counts as a far more obscene waving of their pricks in our collective faces.(a breaking story ;I don't have a link to hand but Schiff was targeted and many others it seems) Oh it it the New York Times https://www.nytimes.com/2021/06/10/us/politics/justice-department-leaks-trump-administration.html

There may actually be a disadvantage to not masturbating (a "medical fact") If you think Mary seems nice then you should consider finding time for onanism in your schedule

Perhaps you still remember Harold14370 from the .com site?(Dirty Harry😀 ) Some years ago I fell into the trap of asking about "events" in a GR context and was curtly dismissed by him **because I did not know what an "event" was (it is just a point on the spacetime graph,I think) Seems like those "events" I was clumsily introducing then may be the kind of thing you are talking about ; another way of describing a fundamental interaction. A kind of a phenomenological "atom" (in the historical sense where it was applied to a supposed irreducible building block of nature)? **well he was one of the leading experts on GR there then ,as well as being the Admin.

Would I be right to understand that this is a description of the impossibility of knowing the simultaneous position and momentum of a particle? If it is not an example of the "how not why" question could I ask why (or how) this is the case? Is this an observer related phenomenon or is it the case that the particle itself cannot actually be in a particular place with a particular momentum? (as applied to a particular frame of reference if that does not in itself imply an observer) I wanted to post in this thread https://www.scienceforums.net/topic/125204-life-was-inevitable/?do=findComment&comment=1178225 but thought it was better to start a new thread......

Yes,that is what I meant.Suppose that there were eddies in the medium(caused by local areas of pressure differences,I think) then that would alter the characteristics of the medium and the speed of sound in it.. I am finding it a bit hard to follow now .I am probably going to need a longer period of reflection and study if I am going to make sense of it. Thanks for your help.I hope I wasn't too confusing.

Ah yes, a scrivener's error 😒

@MigLOK,if I take the two trains scenario of @sethoflagos and impose the restriction (if necessary)that the trains travel below the speed of light as well as specifying that the medium is at rest with respect to itself can I say that the speed of sound is "invariant" in the same sense that ,in a vacuum the speed of light is "invariant"? Or are there still differences between the two situations such that I cannot say this? It seems to me that ,under my (if necessary) restrictions that sound waves have a constant speed dependent on the particular (homogeneous and at rest with itself) medium and also that this speed is independent of the frame of reference Perhaps I am wrong on this last point? I realize that my restrictions may make this assertion of trivial importance but am I correct to describe the speed of sound as invariant under those limited conditions?

Thanks,yes I am happy with the two trains scenario.** It serves my purpose exactly. I am still reflecting on what lesson I can draw from this result (assuming noone disagrees with your understanding) ** and your information regarding meteorites, fireballs etc.

Sure I did have a possible connection to relativity on my mind. Let me gather my thoughts for a few hours or a day and see if I can take it any further or if this has no bearing on the invariance of the speed of light(where I was going to and hopefully may still)

They explode (or just make sounds waves) separately but at more or less the same location in space and time. I suppose they are far enough away from each other that their respective sound waves don't interfere too much and the observer makes out two separate sounds coming from the two meteorites (or other objects disturbing the atmosphere,which could be of course any medium) These two events are as close together as practically possible. I want to satisfy my own mind that the direction of the meteorites' trajectory has no bearing on the length of time that it takes the sound wave to reach the observer on the ground. I feel it is just the spatial distance between either of the meteorites and the observer (and of course the medium,) that determines the time taken for the sound wave to travel The medium is taken ,ideally to be at rest wrt the observer.

Sorry ,I don't get what you are saying.Suppose the observer is 10 miles from the location in the atmosphere where the two meteorites simultaneously exploded(or caused sound waves) will the observer hear two explosions at the same time or will there be a difference in the arrival times of the respective sound waves on account of the respective states of motions of the two meteorites? Will the sound waves coming from the meteorite that is ,say mostly moving towards the observer arrive at the same time as those coming from the other meteorite that is ,say mostly moving away from the observer? (I feel they should both arrive almost simultaneously but it is the first time I have asked myself this question.)

So the observer might not hear the two sounds at the same time? Even though the two sounds emanated from practically the same point in time and space?

Suppose there are two meteorites which approach the atmosphere of the Earth from different ( maybe opposing) directions. Let us assume that the atmosphere is at rest with respect to an observer at ground level. At the moment that the two meteorites are in very close proximity to each other, they explode in a symmetrical way and create sound waves (that do not interfere with each other) My question is "Does the observer hear the two explosions at the same time,albeit at different pitches?" (I am asking this qustion in order to hopefully better understand the invariance of the speed of light , but first I need to understand this present situation)

Ah yes,The Neutral Zone.Yes it does tackle the subject.

Which episode is it? That trailer doesn't seem to me to cover the subject matter of body freezing... "Star Trek The Next Generation: Conspiracy" doesn't look the right one to me. But you say it is a fairly common theme? They deal with the danger of being a fish out of water in that context?

Have there been any good novels based on people's experience when they are woken up in the future after being frozen in one of the Freezer banks in the 21st century? Imagine the (horrifying") setting It is 2420 and they have reached a cure for the disease that prompted you to go down this route in 2020. Gradually they wake you up from the coma ,all the while treating your illness and then you are awake. What would be the first thing you would see? Would your new doctors bear any resemblance to the last people you saw before going under? What would be their attitude to you? A guinea pig ? A freak show? A source of funds /entertainment? Would they go public at first? How did they find you ? Have there been any novels written along these lines? Seems to me a bit like the film Alien but not as sexy.

Who?Me or you?

If ,in the latter case the lines of latitude and longitude are wavy? All points of the surface of the sphere can be assigned a pair of values even if the lines of latitude and longitude are not straight. I think that is what Einstein referred to as a "reference-mollusk" (the spacetime coordinate lines turning wavy in the presence of mass-energy) https://www.physicsforums.com/threads/what-einstein-meant-when-he-termed-something-a-mollusc.391139/

Which is what I was implying.

Well,I keep mine in the fridge and have no problems(had some small ones there that had been unused but looked OK for maybe 8 weeks until we threw them out out of boredom) If you are actually trying to get them to germinate because you are planting I think the advice is to give them light and so I always put away any potatoes that I am going to eat away from the light. I would imagine that a cooler temperature is better for storage. There is a thing called a clamp where you store potatoes in situ in the garden or field. https://www.allotments4all.co.uk/smf/index.php?topic=61705.0

If your potatoes had started to sprout in storage I would expect them to be fit for throwing out. If I am looking for potatoes I try to buy them firm and plump. Could someone where they are stored have been detailed to remove any chits from the spuds so as to make them seem better and not throw them out..? If they were stored at close to freezing maybe that might have damaged them too.

https://www.bbc.com/future/article/20210519-the-hidden-reason-processed-pet-foods-are-so-addictive "Finally, no list of palatants would be complete without pyrophosphate, described in Popular Science as "cat crack". This common additive performs a number of roles in human food, such as preventing potato products from going dark after they're cooked – none of which involve improving its taste. Nevertheless, cats go nuts for it, possibly because it intensifies the flavour of amino acids. Any connection to what you were wondering about?

We never "bump into" space do we? Isn't that a handy way to understand whether something we observe has an objective existence or whether it is a reflection of our thoughts? We can change our thoughts (as when we dream) but when we "bump into" external circumstances we quickly learn on which side our bread is buttered and align them accordingly(though some of us are slow learners