geordief

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

https://www.youtube.com/watch?v=DGHjHU_Z8d8 OK

A coincidence/connection that 360 degrees is the same as the number of degrees that a radius of a circle completes in a complete revolution ? (or just the length of the perimeter of a circle) (that was why I guessed 360) Yes ,"open space" seems to be another description of negatively curved spaces.

What would be the greatest number of degrees that a triangle could have in a (closed?) curved space? Is it 360? Is it always 180 if the triangle is small enough and 360 if the triangle is large enough? And what is the smallest number of degrees that a triangle can have in a (open?) curved space? Zero?

Well ,I was in at the fire last night, staring at it and waiting for a piece of wood to burn through and fall down. It seemed to me that ,no matter how closely I paid attention to this anticipated event it always occurred when I was not looking. Can I elevate this seeming characteristic of such events into something of a principle? Do "events" never exist in isolation but always as part of a sequence and are the links in the chain of these sequences always blurry and never "standalone ? Or is it more a question of our inability to see clearly enough and in enough detail? So do all events "bleed into one another " in spite of one's inclination to believe that they are separate from one another?

Seems the common cold is reappearing as restrictions ease in the UK https://www.thetimes.co.uk/article/colds-are-even-more-common-as-covid-lockdown-eases-0vb8n2h9s?utm_medium=Social&utm_source=Twitter#Echobox=1619864588 There may be a paywall to the body of the article.

Only a song . Van Morrison

Real men don't need artificial stimuli.

I am enjoying these new Feynman videos which feel a lot clearer to me ( up to now any videos I found were blurry and muffled) https://www.feynmanlectures.caltech.edu/ There is a scrolling text feature accompanying the talks which I find is a great help too.

I see. It's the relation. Is it possible (if undoubtedly impractical) to redraw s/t diagrams so that all axes have units of time? (I think I may have heard of theoretical extreme circumstances where space and time could flip .Is that "not impossible"?)

That formulation might seem to put our understandings of space and time on something of an equal footing. As I understand it the equations that allow us to make the space-time diagrams actually have both/all axes as spatial with the "time" axis involving the "c" multiplicator so as to be of mathematical use (ie all axes have the same units). So "t" in the graph seems to me to be a tiny factor (although clearly present) Would a description such as "space-timed light distance" be as accurate ,if a lot ,lot ,lot less catchy? Is it possible to reformulate the space-time diagrams in such a way that all the axes are represented in terms of time rather than space?