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Asimo posted:I liked how the included "safety goggles" did absolutely nothing to stop the laser beam. Platystemon posted:Wait till you hear how easy it is to get directed kinetic energy weapons that fit in a pocket. The difference is that it is not commonly known just how easy it is to permanently blind people (or crowds of people) with high powered chinese lasers (which people also dont realize are illegal). It was a big enough problem when they were just being used to blind aircraft pilots, but now some youtuber is going to make a "prank" video of him shining a laser at random people down the street, or groups of people at a concert or show.
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Dec 14, 2019 19:08
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chitoryu12 posted:Failed surgery on a grape? Mute the audio, but this video demonstrates it https://www.youtube.com/watch?v=PGX289yjew8
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Dec 31, 2019 07:42
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Lead out in cuffs posted:Some good OSHA content here from Popular Mechanics: Do farms still have above-ground gas tanks like this? 
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Jan 10, 2020 22:10
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drat this rules, they actually did a really good job with it
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Jan 16, 2020 19:10
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Harveygod posted:Annual CHP refresher training. Wife made cookies: These rule!!!
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Jan 27, 2020 16:58
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Cojawfee posted:There's no such thing as combined speed. Unless one car keeps going unimpeded, a head on collision with both cars going 40mph is the same as hitting a wall at 40mph. Sure i guess, if walls flew at you at 40MPH
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Jan 30, 2020 19:16
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BMan posted:This is the case for cars of the same size of course, if you ram a semi then it pretty much is a wall coming at you at 40mph This is obviously impossible!!
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Jan 30, 2020 21:56
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Ornamental Dingbat posted:Quoting from the coronavirus thread- I've never heard of radioactive MREs before: That's because its fake you pillock
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Feb 13, 2020 02:14
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Squalid posted:https://www.youtube.com/watch?v=C7TwBUxxIC0 You can still buy Antistatic brushes with Polonium 210 inside, and apparently they work great https://amstat.com/products/anti-static-brush-with-ionizing-cartridge-1.html https://www.orau.org/ptp/collection/consumer%20products/staticeliminator.htm
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Feb 19, 2020 02:19
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Ornamental Dingbat posted:Of course this is audiophile bullshit. Mostly used for film, but yes that too. I can't find it now, but at one point there was a radioactive ionizer sold for use *inside* record players--I think it was an encapsulated radioactive source that clipped onto some part of the arm. It probably also worked, but only for a year or two and so was probably never worthwhile. An even dumber idea was radioactive spark plugs (which again, definitely worked, but only for the first year and afterwards were toxic waste): https://www.orau.org/ptp/collection/consumer%20products/sparkplugs.htm A slightly more interesting application was with neon lamps. One weird (and mostly forgotten) aspect of neon tubes is that some of them don't work very well in pitch dark, and can fail to light up at the rated voltage, or do so unreliably. One solution is to add a small amount of Krypton 85 to the gas mixture, increasing the ambient ionization in the tube (another solution IIRC was to include a tiny incandescent lamp inside electronics that relied on neon tubes or voltage regulator tubes). This allows them to be breakdown reliably at the specified voltage Slanderer fucked around with this message at 06:09 on Feb 19, 2020 |
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Feb 19, 2020 06:04
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Sagebrush posted:Wrong. Lithium batteries are happiest at somewhere between 50% and 90% of full charge. Fully discharging the battery and then leaving it for several months is a good way to cause damage because the natural self-discharge may bring the cell below its normal cutoff point. If you plan to leave the device unattended for several months, charge it up first. After talking to multiple cell manufacturers, we settled on ~50% for storage I think. Storing it slightly lower than that might reduce degradation, but it also decreases the amount of time you can safely leave it in storage. When you then need to account for quiescent current from whatever the battery is connected to, along with increased self-discharge due to being potentially stored in hot warehouse or a very hot car (for instance), you can increase that to 60-80%.
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Feb 19, 2020 22:13
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Sagebrush posted:That's going to be defined by the phone's firmware and/or the charge controller. Depends on the battery chemistry, but a lithium cell might have a maximum voltage before damage of 4.20v and a minimum value of 2.90v. Those voltages get set as 100% and 0% by whoever is making the decision. You could squeeze out a little more capacity by setting 0% as 2.85v, but going too low will cause the battery to degrade faster, and very low will cause damage. To maintain a longer life you set your endpoints as say 3.0v and 4.1v. You also need to decrease the charge termination voltage when you have series connected cells (such as in a laptop) and mismatches between the cells mean you can end up overcharging some (even if they're "balanced", impedance mismatches still result in voltage differences when charging voltage is applied). This might be less of an issue with higher-grade S-ranked cells (I lol'd when I realized the japanese companies actually grade their cells from S to A to B to C and so on), but I never bought those. Aside from the charging voltage thresholds set by the battery (for smart batteries) or charger, the device itself can also lie to you about it's charge state. Standard Li-Ion cells will probably blow up if you tried to trickle charge them by repeatedly topping off a battery as it slowly discharges (from self discharge or quiescent current from whatever circuitry its connected to). It's common for a battery that is fully charged to remain "fully charged" until it discharges to say 95%, at which point the charger will kick back in. Until this happens, though, some devices can and will lie to you about whether or not the device is charging and/or fully charged.
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Feb 19, 2020 22:25
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Zernach posted:Can't you do that same thing with a 9V battery much easier (and safer)? Yeah, steel wool + a 9V battery is an excellent all-weather firestarter
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Feb 21, 2020 01:20
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chitoryu12 posted:How about where you watch the video and see the car intentionally driving into oncoming traffic? It's almost like people start driving recklessly and endangering others when they're involved in a high speed chase?? Too bad the cops are compelled by ancient oath to keep up the chase, no matter how many bystanders might get injured or killed in the process.
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May 11, 2020 16:35
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gloves might kinda be necessary when handling raw lumber all day
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May 15, 2020 15:59
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Jabor posted:Another interesting radiation and wood related thing: trees in the Chernobyl exclusion zone don't rot - at least, not as much as trees everywhere else. They just die, and stay standing there dead, and the leaves pile up deeper and deeper on the ground. This sounds entirely fake lmao
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May 29, 2020 04:42
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Memento posted:
The first author is an anti-nuclear hack whose findings are consistently unreproducible, and the last author has been a pariah ever since he was ruled to have fabricated data to prove some bunk evolutionary biology hypothesis. Googling him finds this article from 2006 where the only person to defend him is the first author. So yeah, this is 100% bullshit lmao
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May 29, 2020 05:04
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PHIZ KALIFA posted:people who oppose the industry can't be trusted. only people who work for the industry know what's best. ah yes, Big Nuclear, that industry with so much power that nuclear plants are springing up left and right every day
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May 29, 2020 05:27
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Sagebrush posted:it's an interesting thing to consider. radiation, and in particular a chronic low level of radiation, doesn't have the same effect on every creature. One thing to consider is that low level radiation* doesn't actually seem to be harmful to people---it seems like our bodies deal with it just fine. Basically anywhere there is a lot of granite has significantly elevated background radiation, but no more cancer than average. This is important because it basically disproves the "linear threshold model" for radiation, which is used to claim that cancers caused by radiation have a linear response to dose and that there is no threshold below which radiation causes no cancer. Despite lots of evidence showing that this model is bullshit, it still gets used as the conservative estimate for radiation induced cancers for entirely political reasons, and is much loved by anti nuclear advocates. The usage of this model following Chernobyl caused a ton of psycological and economic damage from people in western europe overreacting and freaking out despite not being at risk. I'd wager that an entire generation of anti-nuclear fanatics was born from the pscyological trauma caused by the linear no threshold model lmao. *depending on your definition of low level
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May 29, 2020 05:39
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I would execute an emergency braking maneuver at highway speed that launches the antifa predator from my Rig, before calmly unloading all six rounds from my customized Chiappa Rhino into dirtbag. I would then perform a u-turn on the freeway, inadvertently causing a Tesla’s Autopilot to mistake my trailer for the sky and instantly decapitate its driver as it collides at 70 mph.
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Aug 3, 2020 07:58
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Nothing wrong with a DIY hammer drill
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Aug 13, 2020 00:31
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I think this has been posted before, but I didn’t see until now that it changed direction because of the two guys at the bottom pushing on it lmao
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Aug 23, 2020 01:43
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Bobulus posted:He did that comprehensive teardown on the Juicero, right? I recall that video being very fascinating. It's a shame. It was an awful video though, he didn't know wtf he was talking about lmao
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Aug 27, 2020 17:41
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Alkydere posted:The second one is great because of him watching a video of someone else screwing with white phosphorous with an expression of utter horror. I'm pretty sure I got this as a magic trick kit as a kid. I think it came as a small tube of brownish oily liquid you rubbed between your fingers? edit: nvm it was this stuff, which is wax, rosin, oil and latex: https://www.amazon.com/Magic-Supply-House-Mystic-Smoke/dp/B008Z25XFW Slanderer fucked around with this message at 22:09 on Sep 14, 2020 |
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Sep 14, 2020 22:04
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badass
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Sep 22, 2020 01:17
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Cat Hatter posted:Not to mention the F-35 has a much better radar and engines that make about as much dry thrust as an F-16 makes at full afterburner. Doesn't matter lmao, the F-35 is one and a half times the weight of the F-16 and generates more drag because it's a giant idiot plane designed for no one
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Oct 2, 2020 22:06
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Flannelette posted:"Would have to be deliberately planned" is a good summary of this thread. Lots of them. "Atomic Gardening" is just one form of cultivating induced mutations https://en.wikipedia.org/wiki/Mutation_breeding
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Oct 13, 2020 06:44
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null_pointer posted:Wouldn't this actually be not too horrible, if the trailer was empty? This is absolutely A Thing. This is a container hauler made for this purpose. I assume it's generally used for moving *empty* containers, which it probably does more cheaply than a semi, especially over short distances. I can't tell whether or not that container is really too long for the trailer, since google images brings up results showing this exact setup. But maybe it depends on weight and whether there are external indicator lights attached to the back, idk At first I just thought this video looked weird bc the back wheel wasn't spinning, before I remembered that's just an optical illusion lol
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Oct 15, 2020 23:00
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Memento posted:The worst part is that since Ancient Greek times we've known that asbestos was bad for people. Widespread research in the 1930s linked it with cancer. James Hardy spent decades fighting in the courts until everyone they sentenced to death with mesothelioma had either died or given up. Wikipedia posted:The term asbestos is traceable to Roman naturalist Pliny the Elder's manuscript Natural History and his use of the term asbestinon, meaning "unquenchable".[7][8][12] While Pliny or his nephew Pliny the Younger is popularly credited with recognising the detrimental effects of asbestos on human beings,[14] examination of the primary sources reveals no support for either claim.[15]
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Nov 17, 2020 06:43
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Memento posted:Kratzke, P & Kratzke, RA (2018) Asbestos-Related Disease Journal of Radiology Nursing, Volume 37, Issue 1, March 2018, Pages 21-26 huh!
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Nov 17, 2020 08:22
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Brown Moses posted:Forensic Architecture just put together a video reconstruction of the Beirut Port Explosion, which demonstrates how you accidentally build a giant bomb in the middle of a major city by ignoring safety regulations Do you have a video demonstrating how you accidentally photoshop photos of "barrel bombs" to give pretext for attacking Syria? Or is that still in progress? (USER WAS PUT ON PROBATION FOR THIS POST)
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Nov 17, 2020 15:48
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Duzzy Funlop posted:The recovery pics of the thumb-fleshbag are somehow as gruesome as the injury pics, yeesh I absolutely cannot figure out what was grafted there
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Nov 25, 2020 05:47
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Yeah, this doesn’t seem right at all.
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Dec 8, 2020 07:21
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Wrr posted:So I'm an ATCALS tech, working on ILS, TACAN, DME, radios, voice switches, the works, y'know? Clearing out the ten million cables and cords we have laying around trying to find out what is still usable and what can be tossed and I came across some real upsetting home-brew stuff. All of those seem fine depending on the context, I've probably have technicians make me those exact cables before lol. But I'm usually dealing with hardware prototypes, or a system test bench (hardware that has been torn apart and reworked so that all of the printed circuit assemblies inside can be laid out in a fixture so that you can probe and debug it while it's running). The cables that have quick connect on AC wires is especially familiar, since I've seen internal power supplies that could connect to. Really, the only one that stands out is the terminal block--a shielded terminal block is preferred for AC.
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Dec 23, 2020 18:51
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Azhais posted:I'm from Minnesota and I can't remember the last time I used more than a thin blanket. Setting an actual fire under my bed would be miserably hot Your crappy state gets more in federal home heating subsidies per person than most people in other states spend in total so you can use a thin loving blanket.
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Jan 1, 2021 07:50
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Dip Viscous posted:Thread overlap crosspost: idgi, are you amazed that companies make machines to slice bread in an industrialized fashion?
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Feb 8, 2021 03:08
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Dip Viscous posted:I'm amazed that a company managed to make a bread slicing machine that looks that wildly dangerous while still being clearly slower than just using a knife. lmao are you serious? It's a chute-fed bread slicer that will probably slice as fast as you can gravity feed it lol. A guy was manually feeding it to demonstrate it (although it's a bad demo because the thing wasn't adjusted right for that size bun). It wasn't particuarly dangerous to nudge a piece of bread into it, several inches from the blade (way safer than a band saw lol), as bread is not an entrapment hazard lmao but nah you're right, let's replace the production lines used to make all of the bread we buy (directly or indirectly) with a few guys with knives that dont cut as cleanly or as smoothly lol
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Feb 9, 2021 00:41
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Dip Viscous posted:What if there was a medium between a few guys with knives and a machine that seems designed to tear hands off? You mean like that exact machine, which is designed to be chute fed and not have hands anywhere near it? Memento posted:You know no one's hands ever get anywhere near the production lines, right? ?
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Feb 9, 2021 03:01
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im genuinely convinced you lack the capacity for abstract thought and possibly imagination
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Feb 9, 2021 06:54
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Memento posted:You were talking about "the productions lines that make all of the bread we buy". As as aside: this is true for commercial brands, but isn't true for local bakeries (which have non-production line versions of loaf slicers), grocery store bakeries (which mostly bake frozen parbaked loaves, but still slice them) and smaller local bread suppliers (the people who do daily deliveries to restaurants). Those processes have more human involvement, because they can't setup dedicated lines for each item, and need more flexibility. Doesn't change the fact that the video in quesiton was a demonstration of how a machine worked when it was hand fed a bun instead of gravity feeding it lol
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Feb 9, 2021 06:59
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