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On March 12 2021 07:54 Sbrubbles wrote:Show nested quote +On March 12 2021 04:49 Simberto wrote:
Exactly. If you are far enough away, there is really no difference between a black hole and a star of equal mass. The difference with black holes is that all that mass is in a single point, meaning you can get very close to it. And if you get very close to that single point, you can no longer escape. That is the event horizon.
However, if the sun were suddenly exchanged for an equal mass black hole, the only change to earth would be that it would get very cold. The earth would still orbit that black hole, and we could still launch stuff away from the solar system without any problems. This would only change once we get within about 3km. (I am not certain of that number, the main point is that the event horizon of a black hole the mass of the sun is tiny) Once we are that close, we pass the event horizon, and are indeed trapped, and our light is also trapped. We would probably get ripped apart by tidal force far before we get there, but that is another topic altogether.
My main point is that black holes are not some kind of magic space vacuum. They behave like anything else with mass until you get very close to them. This got me thinking: it's weird that the mass in the singularity of the black hole occupies no volume. That must mean that if an atom enters a black hole, there is a moment (when it reaches the center?) when its volume is shrunk into nothingness. Does this conflict with our understanding of the fundamental particles of matter? What would happen to these fundamental particles when they (lacking volume) cease to be matter and become energy?
I don't think anyone has any clue what the inside of a black hole looks like. My guess is that it is weird and strange.
However, matter being point-sized is not something uncommon. As far as we (or at least I) know, electrons are point-sized. (Meaning no experiment has found anything but "the electron is smaller than what we could measure"). I don't know about the size of quarks.
Also, matter turning to energy is a pretty common thing, too. It is what nuclear energy (both fission and fusion) is based on.
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On March 12 2021 01:11 zev318 wrote:Show nested quote +On March 11 2021 23:54 Harris1st wrote:
Outside of your room from another room or from outside the house?
You can't just put foam panels on the facade of your house. So it's all about closing the gaps. Uninsolated shutter cases could be a problem. For noise as well as heat. Double or triple layered window/ door? noise from inside the home into my room
That changes stuff. Do you know what the wall is made of?
In general, the heavier the wall/ door, the better the sound insolation.
This should help with the door: www.amazon.de
If the door itself is a lightweight, maybe a new door altogether. Door and doorframe are not that expensive if you do it yourself. Heavy wood or something along those line
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United Kingdom7084 Posts
On March 12 2021 15:33 Simberto wrote:Show nested quote +On March 12 2021 07:54 Sbrubbles wrote:On March 12 2021 04:49 Simberto wrote:
Exactly. If you are far enough away, there is really no difference between a black hole and a star of equal mass. The difference with black holes is that all that mass is in a single point, meaning you can get very close to it. And if you get very close to that single point, you can no longer escape. That is the event horizon.
However, if the sun were suddenly exchanged for an equal mass black hole, the only change to earth would be that it would get very cold. The earth would still orbit that black hole, and we could still launch stuff away from the solar system without any problems. This would only change once we get within about 3km. (I am not certain of that number, the main point is that the event horizon of a black hole the mass of the sun is tiny) Once we are that close, we pass the event horizon, and are indeed trapped, and our light is also trapped. We would probably get ripped apart by tidal force far before we get there, but that is another topic altogether.
My main point is that black holes are not some kind of magic space vacuum. They behave like anything else with mass until you get very close to them. This got me thinking: it's weird that the mass in the singularity of the black hole occupies no volume. That must mean that if an atom enters a black hole, there is a moment (when it reaches the center?) when its volume is shrunk into nothingness. Does this conflict with our understanding of the fundamental particles of matter? What would happen to these fundamental particles when they (lacking volume) cease to be matter and become energy? I don't think anyone has any clue what the inside of a black hole looks like. My guess is that it is weird and strange. However, matter being point-sized is not something uncommon. As far as we (or at least I) know, electrons are point-sized. (Meaning no experiment has found anything but "the electron is smaller than what we could measure"). I don't know about the size of quarks. Also, matter turning to energy is a pretty common thing, too. It is what nuclear energy (both fission and fusion) is based on. Nah, quantum physics is just weird in that real life analogies no longer useful description of anything. Atoms occupy a "volume" but that "volume" doesn't actually exist as what we think of as matter. An electron is not a point, it is a static cloud of probabilities that doesn't actually exist as a particle despite having measurable properties. And that's what I got in school before university level. I can only assume for those who actually study quantum mechanics at university it only gets weirder.
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Is this Google? How can I get DOTA 2 on to my second monitor from my MacBook Air?
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On March 14 2021 09:39 Dangermousecatdog wrote:Show nested quote +On March 12 2021 15:33 Simberto wrote:On March 12 2021 07:54 Sbrubbles wrote:On March 12 2021 04:49 Simberto wrote:
Exactly. If you are far enough away, there is really no difference between a black hole and a star of equal mass. The difference with black holes is that all that mass is in a single point, meaning you can get very close to it. And if you get very close to that single point, you can no longer escape. That is the event horizon.
However, if the sun were suddenly exchanged for an equal mass black hole, the only change to earth would be that it would get very cold. The earth would still orbit that black hole, and we could still launch stuff away from the solar system without any problems. This would only change once we get within about 3km. (I am not certain of that number, the main point is that the event horizon of a black hole the mass of the sun is tiny) Once we are that close, we pass the event horizon, and are indeed trapped, and our light is also trapped. We would probably get ripped apart by tidal force far before we get there, but that is another topic altogether.
My main point is that black holes are not some kind of magic space vacuum. They behave like anything else with mass until you get very close to them. This got me thinking: it's weird that the mass in the singularity of the black hole occupies no volume. That must mean that if an atom enters a black hole, there is a moment (when it reaches the center?) when its volume is shrunk into nothingness. Does this conflict with our understanding of the fundamental particles of matter? What would happen to these fundamental particles when they (lacking volume) cease to be matter and become energy? I don't think anyone has any clue what the inside of a black hole looks like. My guess is that it is weird and strange. However, matter being point-sized is not something uncommon. As far as we (or at least I) know, electrons are point-sized. (Meaning no experiment has found anything but "the electron is smaller than what we could measure"). I don't know about the size of quarks. Also, matter turning to energy is a pretty common thing, too. It is what nuclear energy (both fission and fusion) is based on. Nah, quantum physics is just weird in that real life analogies no longer useful description of anything. Atoms occupy a "volume" but that "volume" doesn't actually exist as what we think of as matter. An electron is not a point, it is a static cloud of probabilities that doesn't actually exist as a particle despite having measurable properties. And that's what I got in school before university level. I can only assume for those who actually study quantum mechanics at university it only gets weirder.
I mean, yes, that QM stuff is there in addition to the size. Probability cloud is one way to interpret QM. The basic conclusion of QM is that small stuff is weird and doesn't really behave in a way that fits what we expect from our large-word experiences. We have found mathematical ways to describe this that seems to work very well, but interpreting these mathematical results into a model of reality is often problematic and comes with a lot of problems.
The probability cloud interpretation also has some problems. For example, if you measure the position of the object, that probability cloud immediately contracts to a very small space (the resolution of your detector) Since this would potentially involve the acceleration of parts of the probability cloud, one would expect EM emissions here. Which don't happen.
But you can still make statements about the size of objects, and in case of the electron, the statement we can currently make is that it is consistently smaller than the bottom bound of our attempts to measure its size.
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Hello to all the fans of this game and this team.
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How do you guys get a song out of your head?
Last week a friend sent me this song parady + Show Spoiler + and now I can't stop thinking about the original song. Help!
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On March 23 2021 20:51 Sbrubbles wrote:How do you guys get a song out of your head? Last week a friend sent me this song parady + Show Spoiler +https://www.youtube.com/watch?v=vYmSAMcwXA8 and now I can't stop thinking about the original song. Help!
Listen to it on repeat until you get bored of it.
This might work, or it might make it 1000 times worse.
The choice is yours.
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Having total ecylpse play in your head is awesome, embrace it :D
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3261 Posts
On March 23 2021 20:51 Sbrubbles wrote:How do you guys get a song out of your head? Last week a friend sent me this song parady + Show Spoiler +https://www.youtube.com/watch?v=vYmSAMcwXA8 and now I can't stop thinking about the original song. Help!
Listen to another song that's a bit catchy. I used this f.e. + Show Spoiler +, but naturally choose whatever you like.
That was a neat and well performed parody though.
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On March 23 2021 20:51 Sbrubbles wrote:How do you guys get a song out of your head? Last week a friend sent me this song parady + Show Spoiler +https://www.youtube.com/watch?v=vYmSAMcwXA8 and now I can't stop thinking about the original song. Help!
Normally this happens when your brain is trying to complete something. If you hear the song a bunch of times it should go away
Full explanation: Earworm
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On March 23 2021 22:01 Velr wrote:
Having total ecylpse play in your head is awesome, embrace it :D
Once upon a time I was falling in love. Now I'm only falling apead.
Nothing I can do. Total eclipse of my head.
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On March 23 2021 22:01 Velr wrote:
Having total ecylpse play in your head is awesome, embrace it :D
Problem is I just keep turning around all day
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On March 24 2021 02:18 Sbrubbles wrote:Show nested quote +On March 23 2021 22:01 Velr wrote:
Having total ecylpse play in your head is awesome, embrace it :D Problem is I just keep turning around all day
I see how that can be problematic xD
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On March 23 2021 14:39 gexadoci wrote:
Hello to all the fans of this game and this team.
hello and welcome... 
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Maybe not a stupid question, but i thought that some of you might be able to help me.
I am looking for shoes. Specifically, shoes that fulfill the following requirements:
-Last a very long time
-Vegan
I have no clue how to go about this. My ideal setup would be two sets of shoes, one for the summer and one for the winter. I would wear them every day, and i would want them to last at least 10 years. I do not know if this is even possible. Most shoes seem to be designed to last a reasonable amount of time only when occasionally worn. Which is totally reasonable for the use case of people like my wife, who owns a lot of different shoes and alternates which she wears based on a completely incomprehensible algorithm.
So far, i have usually bought cheaper shoes, which lasted a year or so. I am willing to spend a bit more if i am really certain that that would be a lasting investment, but i would be majorly pissed of spending a lot of money only to have the shoes also fall apart after 1-2 years. And i simply don't know how to figure out which shoes will last. I tried this for winter shoes two years ago, explicitly stating my desires in a shoe shop two winters ago. Yet here i am once again, two years later, and the soles of the shoes that were sold to me as lasting has turned into some kind of weird mesh that hurts my feet.
I know that the desire to get vegan shoes doesn't help here, as high-quality shoes are usually leather. Does anyone have some advice?
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I don't think any shoe will last you 5 worn-years. There's just too much wear and tear. The sole would definitely need replacement after a certain time. Then there's the laces, and the interior which also undergoes a lot of friction every time you get in and out.
Maybe for the summer, sandals might be the most wear and tear friendly thing?
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EPT
