There have been multiple accounts created with the sole purpose of posting advertisement posts or replies containing unsolicited advertising.

Accounts which solely post advertisements, or persistently post them may be terminated.

kbin.life

partial_accumen , to explainlikeimfive in What way did the Titan submersible implode?

I don't think anyone has any real data on the failure point, which is the needed info to know how long it would take to die. There has been lots of speculation that the carbon fiber used (rejected by Boeing as being out-of-spec) or the use of dissimilar materials each with different thermal expansion and contraction coefficients, to the "bubble window" being way under spec because the CEO didn't want to pay for a proper spec one.

Without those we don't know exactly how fast. We don't know if they passengers had any indication of a problem (sounds?) or if it started leaking before it imploded or if it was an instant catastrophic failure.

lorcster123 OP ,

I believe they have found parts of the wreckage. I wonder if we will get any clues to how it happened. I guess either way they wouldn't have survived long

Dettweiler42 ,

The primary cause I'm hearing is the window. It was rated for a dive depth of 1500m, and the sub would routinely dive to 4000m.

IphtashuFitz ,

I also heard the carbon fiber skin wasn’t appropriate for so many massive pressure changes it underwent with each dove.

kobra ,

I think based on the reported sounds from US Navy and James Cameron (what a weird sentence), we are actually pretty sure it was a rapid, catastrophic and instantaneous implosion.

aussiematt ,

I really don't get this. The CEO knows that the window is so seriously under-speced, yet he still doesn't hesitate to jump into the sub himself.

CapgrasDelusion ,

Specs aren't a universal constant. They're defined by humans. Expert humans, but humans. He must have thought he knew better than the experts. He was wrong, but I don't think the lesson had time to sink in.

urabusa ,

He may have thought along these lines... So the window is rated for 1500m interesting usually engineers use a 3x safety factor when they rate something that'd be....(sound of slowly grinding gears) 4500m! But I'm only going about 4000m meters down?

Jackpot! I'm not going to waste my time certifying the window to some silly extra strong standard! Take that you nerds!

platysalty ,

I don't think the lesson had time to sink in

Oh, you.

CapgrasDelusion ,

It was arguably in poor taste, but I'm glad someone noticed regardless.

MrRambunctious , to explainlikeimfive in What way did the Titan submersible implode?

Less than 4 milliseconds. They didn’t feel a thing.

lorcster123 OP ,

Do you think they died from the water rushing in and hitting them unconscious?

MrRambunctious ,

They died by being crushed with enough pressure such that the air inside the sub ignited ie compressed so much it essentially exploded. Death was instant.

lorcster123 OP ,

I know a diesel engine works off compression, but it has a fuel. All fires must have oxygen, fuel, and heat. What fuel would they have in the titan to ignite?

MrRambunctious ,

If you compress a gas enough it will get hot enough to ignite. Google “fire pistons”.

Dettweiler42 ,

It's also why airplane tires are filled with nitrogen instead of air. On landing, the high pressure and heat can cause the oxygen in air to combust.

platysalty ,

On landing, the high pressure and heat can cause the oxygen in air to combust.

Phew. Imagine being the pilot to find that out.

SimpleMachine ,

Everything (including the passengers) inside the sub could have been fuel for combustion had there been time for the reaction to take place. If I remember correctly the interior of the sub could have temporarily been hotter than the surface of the sun during the implosion. Pretty sure just about everything burns at those temps. But the collapse and gas release from the hull happened so quickly I doubt there was time for anything to ignite.

CanadaPlus ,

Ex-people, plastic and so on. With a small room’s worth of air it wouldn’t have burned long, though.

More significant is just how hot it would get as it collapses. When you suddenly compress an an ideal gas (which air is a lot like) it gets hotter in proportion to it’s previous absolute temperature. Room temperature is already 273K, and the pressure down there is hundreds of time larger than at the surface. At some point the law would break down on the way, but you get the basic idea. It was probably as hot as the sun without any help from combustion

CanadaPlus ,

“Rushing” implies something like a wave. The thing crushed flat like the plastic tube it was, and would have done so too fast to even visually track.

lorcster123 OP ,

If you were to slowly lower an open glass into the ocean, it would gradually fill with water. So i just think its the same with the sub, albeit faster?

CanadaPlus ,

Sure, but “faster” here means around the speed of sound, and that’s fundamentally a different thing from the playful streams we’re used to. The thing was waaay down there when it went.

If there was a tiny little hole somewhere that wasn’t getting larger, maybe it would slow down enough to just gradually fill the vessel. In that case, though, it would not have imploded. They found it in pieces and the US Navy heard the pop.

lorcster123 OP ,

Yeah I guess if you think of the fact it actually went ‘boom’ you can imagine the water didnt really flow in but rather flew in very fast. There was probably a huge shockwave that killed them instantly

ndr ,

How did you get this number?

MrRambunctious ,
PrincipleOfCharity ,
@PrincipleOfCharity@0v0.social avatar

Physics and math. J/k. I’ve seen similar numbers thrown about. Here is a link to a Quora question What happens to the human body when a submarine implodes from 2 years ago that may be of interest.

When a submarine hull collapses, it moves inward at about 1,500 miles per hour - that’s 2,200 feet per second. A modern nuclear submarine’s hull radius is about 20 feet. So the time required for complete collapse is 20 / 2,200 seconds = about 1 millisecond.

A human brain responds instinctually to stimulus at about 25 milliseconds. Human rational response (sense→reason→act) is at best 150 milliseconds.

The air inside a sub has a fairly high concentration of hydrocarbon vapors. When the hull collapses it behaves like a very large piston on a very large Diesel engine. The air auto-ignites and an explosion follows the initial rapid implosion. Large blobs of fat (that would be humans) incinerate and are turned to ash and dust quicker than you can blink your eye.

RetroEvolute ,
@RetroEvolute@lemmy.world avatar

Did some math based on that number since it seemed pretty insane. That would mean that each side of the outer hull would have been moving inward at about 425mph by my estimate. Seems slower than I would expect by that number, but 4ms is hella fast.

eating3645 ,

To add context here, it takes your brain somewhere around 100ms to detect and then another 250 to process pain. So 4ms is not only fast, it’s absurdly fast.

To get a sense of how fast it is, go ahead and stub your toe, the time it took to feel it is 100 times longer.

www.jneurosci.org/content/26/42/10879https://lemmy.world/pictrs/image/9454dde6-8f26-4668-be12-bbe531c02f39.jpeg

platysalty ,

I just take solace in the fact that they probably just snapped out of existence instead of having to slowly die in a dark tube over a few days.

JohnEdwa ,
@JohnEdwa@kbin.social avatar

And because what failed was the carbon fibre composite pressure vessel, it probably didn't even give any warnings to make them worried. It would be like squeezing a glass bottle, everything will be perfectly fine until it just instantly shatters.

I_Miss_Daniel ,
@I_Miss_Daniel@kbin.social avatar

Sometimes glass will give a 'click' as a crack starts. Not sure about carbon fibre though.

neverfindausername ,

I had seen a comment saying human to salsa in 4 milliseconds. ಠ_ಠ

Wolfwood1 , to linux_gaming in What headphones are you all using while gaming on Linux?

Currently: HyperX Cloud Alpha

Before: HyperX Cloud

gemew26 , to piracy in Guide: The idiot proof guide to downloading ebooks off IRC. With Pictures and everything!

yeah I remember when I was a kid I used to do this

TWeaK , to fediverse in Does Lemmy automatically strip exif data from posted photos?

That probably would depend on the instance you upload to. Best practice would be to strip yourself first.

Early_To_Risa OP ,

…ok, if you think it would help. Now what?

(edit: oh, you meant the images)

LostCause , to gaming in Is it me or are games really not fun anymore

Learning about the concept of enshittification (https://www.wired.com/story/tiktok-platforms-cory-doctorow/) made me suspect that this might be going on with games too. I mean these always online and monetisation trends seem to suggest so.

Though for me it‘s also the age and work, quest logs remind me of ticket systems and grinding of more repetitive work and it all lost it‘s shine. I enjoy games still, but less often I would say.

Marble_turret , to android in What's your lemmy app of choice?

Boost for Lemmy is coming soon!

czardestructo , to showerthoughts in Lemmy is so good right now for no particular reason
@czardestructo@lemmy.world avatar

All I can picture for lemmy users right now is an excited dog at a dog park that is just loving life and wants to say high to every other dog and is wagging his tail so hard that his whole ass is wagging.

AtHeartEngineer ,
@AtHeartEngineer@lemmy.world avatar

Lol ngl, it's a little like that. I haven't been excited about a new social thing on the internet in a long while.

aseriesoftubes , to nostupidquestions in ELI5 - So why exactly doesnt Biden expand the courts?

Biden can’t just expand the size of the court by himself. Congress has to give him the authority to do so.

The House of Representatives is controlled by Republicans, so any court expansion plan is dead in the water. Even if the Democrats controlled the House, they only have 51 (out of 100) seats in the Senate. There are two Democratic members of the Senate who are basically Republican-lite (Manchin of WV and Sinema of AZ, who is technically an independent). Those two would kill any bill that allowed any sort of progressive change.

If you don’t like it, then you need to do everything you can to fight for Democratic majorities in both chambers of Congress.

TL;DR: Blame Congress, not Biden.

Bongles , to maliciouscompliance in [REPOST] You can't continue working from home because you go idle in chat too often

If your work uses Microsoft Teams, you can go into your calendar, click meet now, have a meeting by yourself. Once you’re in there change your status back to available and it won’t change to away, the screen won’t lock, and no one who cares will know. No jiggler, no script

muaveri , to showerthoughts in Lemmy is so good right now for no particular reason

wait till the bots show around... lol

FinalBoy1975 , to showerthoughts in Lemmy is so good right now because there are no kids here

Enjoy it while it lasts. In no time in your favorite community there will be homework help types of questions as well as those lazy requests for recommendations. “I want to read a book with X vibes.” Not to mention the troll posting on science-related things like “If you are what you eat, will I turn into an eggplant if I eat an eggplant?” Actually, it would be nice if Reddit just recovered and those types of users stayed there. This is so chill without all that stuff.

fiasco , to asklemmy in Do vampires respect tenants rights?

Fun question, but it leads to other questions…

First, are vampires stopped at the property line, or only at the threshold of some appurtenance (e.g., a house)? After all, you’re asking about real estate, and real estate is primarily concerned with land, not buildings.

This sort of matters because, are we assuming that vampire law is coincident with human law? By this I mean, if vampires were to take control of the government and abolish real estate law, would they then be able to enter any property or building, anywhere, anytime?

If vampires do observe human law, then realistically, they probably wouldn’t be able to enter a leasehold without the tenant’s permission. The fundamental right of tenancy is peaceful enjoyment, and in fact tenancy is a legal property right, to access the property in question and do anything, without undue burden, allowed under the terms of the lease. It would be a violation of peaceful enjoyment for a landlord to allow vampires into the unit.

The right of inspection, by the way, is explicitly carved out in real estate law. The right to let vampires into the unit is, to my knowledge, not enumerated.

Notyou ,

Great stream of thoughts. I don’t have much to add, but True Blood had a vampire purchase the house of someone when it was put up for sale. The owner was missing. He didn’t move in. He just bought it to keep it. When she (the owner) came back and moved in the vampire was able to come and go as he pleased even though she was living in the house she grew up in. She couldn’t uninvite him.

fiasco ,

So uh… who put the house up for sale? Did the bank foreclose on the house?

cartmansbellybuttom , to showerthoughts in Lemmy is so good right now because there are no kids here

Let’s be real, kids don’t care about/understand what the API changes are and are on the TikTok

felixculpa , to android in Are you guys tired of "Material You" design?
@felixculpa@lemmy.world avatar

definitely not, the way it fits to harmony of the phone is awesome

  • All
  • Subscribed
  • Moderated
  • Favorites
  • random
  • lifeLocal
  • goranko
  • All magazines