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askscience

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morphballganon , in How long will the Great Lakes last?

Last?

Are they going away?

theywilleatthestars OP ,

I mean most things do eventually

Kalkaline , in Is it possible to receive an electric shock when you *stop* touching something?
@Kalkaline@leminal.space avatar

Yeah, if you move your hand around on those things you’ll get a static shock, it’s going to hurt, but it won’t kill you. If you watch those demonstrations they have a pole they ground the generator out with.

cygnosis , in Could death by starvation be delayed by drinking your own blood?

It wouldn’t delay your death. But it would make it more pleasant. You would most likely pass out from low blood pressure pretty quickly and then you wouldn’t have to worry about starving any more.

over_clox , in Could death by starvation be delayed by drinking your own blood?

I’ve read a story of a 3 year old that had to have his tonsils removed. The poor child didn’t understand that it’s not good to swallow so much blood, didn’t know enough to tell his parents what was up, and he unfortunately passed away, with a belly full of blood ☹️

Fal ,
@Fal@yiffit.net avatar

This seems like an urban legend

southsamurai ,
@southsamurai@sh.itjust.works avatar

Absolutely not true. Wherever you read it is full of malarkey. I would go so far as to say it is impossible, since your be vomiting unless you were still drugged. It would take sedatives to keep you under long enough to swallow that much, and you can still vomit while sedated.

You also don’t die from a full belly by itself.

Then, there’s the fact that the stomach takes up some degree of water during digestion, and is breaking down any solids that it can break down along the way. You’d have to literally chug the blood to get enough in at once to distend the stomach, and no tonsillectomy produces that much blood.

Almost every single modern procedure uses some kind of cautery to stop bleeding, and the few that don’t still take steps to do so.

Anyone, especially a small child, bleeding enough to die from swallowing it, would never be sent home. That’s a sign of a major problem apart from the surgery.

And that’s ignoring how much blood loss that would be. Even if swallowed, the amount needed to cause death wouldn’t fill the stomach in a small child. Even in a bigger child, the stomach is bigger too, so you run into issues with realism there.

Tonsilectomies are done all around the world, and have been for ages. While complications can happen, this simply isn’t one of them.

over_clox ,

Here’s one documented case of an 8 year old girl from last year, and it took about 6 days of bleeding before she was pronounced brain dead…

wbir.com/…/51-d9385f6b-f3f8-4c22-b0d4-72c2130f1d6…

I can’t quite find the much older story of the 3 year old toddler though, but it was essentially the same thing, and took about a week of health decline before he passed. Nobody knew the toddler was swallowing the blood until the autopsy ☹️

morphballganon OP ,

The poor child didn’t understand that it’s not good to swallow so much blood

It sounds like the swallowing wasn’t the problem, the bleeding was. The swallowing just masked the true symptom, the bleeding, from being observed by others.

over_clox ,

Exactly

xkforce , in Why can't Strings in String Theory be replaced with Springs?

Because thats not the best classical analogy for what they are.

AmalgamatedIllusions , in If Mars has an impact on Earth's Milankovitch cycles, what instability does the nearly binary Earth/Luna system have on Mars, Venus, and beyond?

This is the first I’ve heard of the effect Mars has on Earth’s Milankovitch cycles (unsurprising, given that the paper is recent and the effect is quite small with a very long period). Earth presumably has a similar effect on Mars, but measuring this would be quite difficult. Keep in mind that we’re able to do this for Earth by analyzing drill cores (that paper uses data from 293 scientific deep-sea drill holes), which we can’t really do for Mars currently. Using other methods, we’ve been able to measure the effects of axial tilt and precession for Mars, but the effect from orbital interactions with Earth would be much more subtle. I’d be surprised if you could find anything on it in the literature.

I also would not expect the Moon to make much of a difference. The Earth-Moon distance is <1% of the Mars-Earth distance even at closest approach, so the Earth-Moon system is essentially a point mass to first order. Additionally, the mass of the moon is ~1% that of the Earth, so the effect there is quite small as well. As I mentioned, measuring Earth-Mars Milankovitch cycles is already difficult for Earth (we apparently only recently did so) while likely infeasible for Mars (currently), and detecting the effects from the Moon would be harder still.

xdr , in What happens when you apply a force to an object at close to the speed of light?

What I remember from watching discovery years ago is simply that “time” will slow down so that it takes longer and longer for that object to reach the speed of light. This is the only kind of " time travel" that is theoretically possible.

  1. Not really.

Take for example a star 1 light year from sun. If we start this theoretical machine, it WILL take 1 year for that machine to reach there. Same for 100 light years distance. That’s the amount of time it takes for light to travel that distance.

BruceTwarzen ,

My head hurts now.

CanadaPlus , in Do we have any theories as to why complex life eventually started requiring various metal elements as micronutrients?

I’m guessing the main reason is “why not”. It’s in the environment, and one day some critter mutated a new process that involved it.

It’s not just complex life, either. Bacteria use all kinds of strange elements in various enzymes and complexes.

wahming , in Have we been able to reproduce the conditions to bend rocks? (Even if in a lab.)

Do rocks bend? Pretty sure they just melt, that’s where lava comes from.

remotelove OP ,

Rocks bend and it’s mind boggling to see the scale that it can happen at.

en.wikipedia.org/wiki/Fold_(geology)

In these cases the rock may be hot, but it’s not molten. I was even just reading that many rocks will not have any internal stresses from being bent because of the forces and the time that is involved.

wahming ,

Neat!

CanadaPlus ,

Nope. The mantle is mostly solid. It’s just so huge and, under intense pressure and heat, bendy, that it still facilitates moving continents and ocean plates.

half_built_pyramids , in What is known about Persistence of Vision in various animals?

Cats can out speed snakes. If they have an fps it must be super high

SariEverna , in What is known about Persistence of Vision in various animals?

I don’t have a source for it, but I recall hearing that yes, their eyes work at a different speed than ours, and that’s part of why cats and dogs are generally not so interested in TV. Unfortunately I don’t know what search terms might be useful here since I don’t know if this has a technical name, but something like “refresh rate” or “fps” might help in the search.

SpaceNoodle ,

Sometimes my cats will be interested in TV, especially if there are really interesting birds. One cat in particular was very interested in Felix the Cat cartoons.

neptune , in What's the equivalent of physics constants for social studies?

I think gravity and light work the same on psych majors as it does physics and engineering students…

I kid.

So in biology I know e the Euler number is important. It is used in growth equations (from finance to physics as well).

Statistics is fucking huge in every field. That is how you measure uncertainty. Bell curves and the Five Numbers and all that stuff is how you analysis thousands of widgets coming off an assembly line, or measurements in the social sciences field.

SPRUNT , in [Biology] The umbilical cord: is it 'necessary' to sever it, or is it designed to disconnect on its own eventually?

Do you want a Quato? Because that’s how you get a Quato.

Sims , in Is there any scientific study about where should the bed be facing?

Doubt it, and www.semanticscholar.org says no, but I might not have the right search words. Try it out.

This one checks whether open windows influence sleep, so at least there’s some vague recommendations in there: semanticscholar.org/…/474319b817b0c581a72113c194f…

starman2112 , in Is there any scientific study about where should the bed be facing?
@starman2112@sh.itjust.works avatar

I don’t have any data to bring to the table, but just think about our evolution. It makes sense to me that we evolved to be able to get our sleep when we can where we can, rather than needing to face a certain direction or have the window to a particular side.

Psychologically, it makes sense to me that you’d be most comfortable in a position where you can see the door, but I have to assume our ancestors 10,000 years ago didn’t have the luxury of pointing northward or something. Maybe it’s best to have a window facing east so you can get natural sunlight in the morning.

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