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Who wants a library full of crumpled porno and Ayn Rand?
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Feb 19, 2021 19:26
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Mister Speaker posted:Do tanks have suspension in a similar sense to cars? I imagine this is probably pretty painful for the crew, either way. They definitely have suspensions, but on modern tanks they are generally torsion-bar type. And yes, if the crew was not expecting that it would be very easy for them to get banged up.
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Feb 27, 2021 02:05
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Antigravitas posted:
That's what they were going for, but what happened was the explosive detonated. https://www.bbc.com/news/world-europe-54522203 quote:"The deflagration process turned into detonation. The object can be considered neutralised, it will not pose any more threat to the Szczecin-Swinoujscie shipping channel," said Lt Cmdr Grzegorz Lewandowski, spokesman for the Polish Navy's 8th Coastal Defence Flotilla.
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Feb 28, 2021 17:51
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central dogma posted:Regarding astrophysics chat, I saw a video recently that I can't find anymore. It was a bit lengthy. Basically the narrator took some liberty to suspend disbelief and let us travel in a ship capable of reaching lightspeed. He talked about all the time that would pass on earth the faster you travel. How after a certain time, earth would be unrecognizable if you were to return. Eventually you reach a speed (or distance) where its impossible to even go home because the universe is expanding faster than the speed of light. In fact, you reach a point to where the universe is expanding faster than light in all directions relative to you, so you are, in fact, forever isolated from everything else in the entire universe. Was it Cosmos? https://www.youtube.com/watch?v=lPoGVP-wZv8
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Jun 7, 2021 15:08
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thepopmonster posted:I thought you needed a hypermassive object and an FTL spaceship but apparently you only need a sufficienly fast FTL spaceship to go back in time? Traveling any faster than c equates to time travel.
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Jun 22, 2021 15:58
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Jim Silly-Balls posted:One thing I think I’ve lost the understanding of to time is how objects increase in mass as they approach C. The theory was that if you were in a spaceship approaching C the mass would increase exponentially and it would take more and more power to keep accelerating, effectively capping your speed below C. Electrons have mass. Photons have no mass, but do have momentum. Mass isn't required for a thing to have momentum; momentum=mass*velocity is another one of those approximations that works until velocity starts increasing towards c. E^2 = (pc)^2 + (m0c^2)^2 Where p is momentum and m0 is rest mass. So for a photon, rest mass is equal to zero and that second term goes away, and you're left with E=pc, or p = Ec, which also equals Planck's constant divided by the wavelength.
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Jun 28, 2021 15:15
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Looks like they're gonna need a bigger decoy.
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Jul 19, 2021 21:41
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LeastActionHero posted:: because glass is brittle and not made of different grains, it's extremely natural for it to break along essentially perfect edges. You get the same thing with glass or silicon crystals. It's really easy to break them along a straight line if you score them first, because there's no irregularities that make the atoms want to break apart in any other way. Glass is very different from crystal. That's the distinguishing thing about glass, it's a non-crystalline solid. It's essentially all irregularity, with no long-range order at all. Glass doesn't have any natural planes of separation, it fractures conchoidally, and obsidian blades aren't clean perfect edges. They're knapped.
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Oct 25, 2021 15:22
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Jakabite posted:So what’s the deal here? This? This is ice. It's what happens to water when it gets too cold. This? This is Kent, it's what happens to people when they get too sexually frustrated.
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Jan 25, 2022 17:07
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Lady Disdain posted:Google says that these are a thing, but they're not built into all parachutes; they're an optional extra or whatever. Also they have a failure rate that’s probably higher than “I grabbed the guy and pulled the cord.”
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Mar 26, 2022 02:19
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HenryJLittlefinger posted:It's badass that Mick Foley survived that but it is not badass that it happened or the treatment of professional wrestlers by Vince McMahon. By far my favorite celebrity encounter was when I met Mick Foley in Chandigarh because he was staying at the same hotel I was. One of the friendliest dudes I have ever met.
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Apr 12, 2022 02:55
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Cat Hatter posted:I don't know why people can't just say "I might regret this later, but it's worth it" Sounds like that's exactly what he said.
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May 1, 2022 03:06
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https://twitter.com/LaocoonofTroy/status/1522682618764009473?s=20&t=JsocTAWZcT9KXkMcxPvG4g (It's in Syracuse.)
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May 18, 2022 04:45
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Finland:
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Jul 11, 2022 17:56
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Agents are GO! posted:Just like your dreams. And my wife.
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Jul 12, 2022 23:17
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Mister Speaker posted:I think the interesting takeaway from the 'sound in space' geekbait is that they found a medium of gas in an interstellar object, presumably dense enough to experience oscillating compression/rarefaction that could be called 'sound'. That's nothing new, and the medium of gas is still nowhere near dense enough for anything like sound to propagate through. What happens though is that the speed of sound is calculated based on various physical parameters like temperature and density and you can apply those calculations to near-vacuums just as well as you can to the atmosphere or the oceans, although things change a bit when you're talking about plasmas rather than non-charged fluids: https://en.wikipedia.org/wiki/Ion_acoustic_wave You do need to keep in mind that you're not propagating any wavelengths shorter than the mean free path, and that mean free path is going to be very long indeed (Which is why the "sound" they're talking about there is 50+ octaves lower than anything we could hear), but it's entirely reasonable to refer to this as a "speed of sound" in space, and it's even reasonable to talk about Mach numbers. For example, the termination shock of the heliosphere is the point at which the solar wind slows down from supersonic to subsonic speeds as it encounters the interstellar medium. There's no sound there that you'd hear, but "supersonic" and 'subsonic" are perfectly useful descriptors here. Mister Speaker posted:They've already elucidated that it's extrapolated from something other than 'sound' and pitched up eight octaves to even be audible. But I'm curious how loud it is. How dense is the gas medium compared to our atmosphere, and can we even measure its 'loudness' in any practical or traditional way (i.e: would the Decibel scale even apply)? I asked this on the twitter thread and nobody's responded yet. Threshold of human hearing is 0db/20 micropascals. Standard atmospheric pressure at sea level is about 100 kPa. 20log10(100kPa/20uPa) = 194 dB, which is the loudest sound you can get short of a shockwave. In an molecular cloud, maybe you've got a pressure of 1E-8 pascals, so 20log10(1E-8 Pa/20uPa) = -66.02 dB. So in other words really, really quiet. In the interstellar medium you're looking at 1E-18 pascals. Phanatic has a new favorite as of 18:55 on Aug 22, 2022 |
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Aug 22, 2022 18:45
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500excf type r posted:Gases like oxygen nitrogen carbon dioxide.... Meant to put "interstellar" there.
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Aug 22, 2022 20:35
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Let's see if he can penetrate the thicker pachydermatous outer layers of a watermelon.
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Sep 8, 2022 03:08
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Carthag Tuek posted:but what does it mean that the scale works differently The scale works differently in that the reference level is different,. In acoustics you're talking about sound pressure level, SPL = 20log10(ptotal/pstatic), with pstatic being a standard reference pressure which is 20uP in air but only 1uP in water. So your SPL for a given actual sound power is going to be higher in water. In our atmosphere the limiting point is when the negative side of the pressure wave goes down to 0, you can't get lower pressure than that, so that works out to the 196dB mentioned; you can get stronger pressures on the high side then that but at that point you're talking about a shock-wave, you're dealing with moving the medium itself around and not just a vibration that's moving through the medium. Underwater, you're starting off at a higher pressure, and your limiting point is when the negative side of the pressure wave goes down low enough for the water to start vaporizing. So the deeper you are and the higher the ambient pressure is, the louder a sound you can generate. Human senses are also logarithmic, so "sound energy" and "loudness" are not the same thing: a 3 dB increase is double the energy, but only about a 25% increase in the loudness you'd perceive. Each increase of 10 dB is 10 times the power, so 200 dB is 10^10, 10 billion times more power than 100 dB.
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Mar 14, 2023 18:08
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Eastbound and mown
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Jun 1, 2023 18:47
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Lazy_Liberal posted:how DARE cousin turn against cousin and instigate such surf violence??? ban them both from the waves This is how the beaches become battlefields.
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Sep 19, 2023 15:25
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Moly B. Denum posted:African porcupines don't have barbed quills that come out like that, they're just pointy. Probably still unpleasant to get a face full of them like that leopard did though. They might not be barbed but they sure do come out: https://www.youtube.com/watch?v=6E63-EQuv1Y&t=348s You can even see directly in the video that the leopard's got some quills stuck in him. Take a look at 0:45, he's even trying to pull some of them out. Phanatic has a new favorite as of 17:49 on Sep 20, 2023 |
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Sep 20, 2023 17:46
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freeedr posted:
It's only "race official," the offending rear end in a top hat is the race director Jock Semple. In this photo, it's the dude behind her in the dark coat that's trying to steal her number. The smaller dude to her right is her coach, he's trying to fend the guy off. Eventually her boyfriend, #390, turns around and levels him. Phanatic has a new favorite as of 18:43 on Feb 5, 2024 |
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Feb 5, 2024 18:38
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Mar 17, 2024 02:00
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