Ask Science

nottheengineer , in How is the moon tidally locked?
Hypersapien OP ,

So why doesn’t the moon rotate around the axis that’s on the line that points from the Earth to the moon? The “Z” axis as we look into the sky?

Or does it?

nottheengineer ,

Try recreating that spin with a fidget spinner and slowly turn it around like the moon turns to face earth. You’ll find that it wants to turn in a way where it spins around the same axis it’s orbiting.

Since the moon has no hand preventing it from doing that, it aligns its spin with the orbit, so the forces described in the article bring that rotation to a halt.

Kolanaki , in Is it possible to receive an electric shock when you *stop* touching something?
@Kolanaki@yiffit.net avatar

If you're in some kind of science experiment where you're being conditioned to not stop touching something: Yes.

morphballganon , in How long will the Great Lakes last?

Last?

Are they going away?

theywilleatthestars OP ,

I mean most things do eventually

STOMPYI , in How much longer will the age of Science last?

The connection of mind amd matter. We will join it with other frameworks as a complete system of intelligence and human wisdom. Understanding true nature and its inherit empty nature is but a step to letting go of desire and freedom from suffering.

It joins spirituality and helps make it a lifestyle. Activating the PNS rest and digest is at the heart of all spirituality I see, from chanting to singing to silent prayer to whirling dervishes to yoga to the 112 ways of Shiva to Janisism to Gnosticism to teachings of love to Chakras to Mongolian throat singing and even shoalin.

Everything we do can be processed on the ANS fight or flight or PNS rest and digest. History has shown many people attaining great wisdom by pure reflection inward working a full balanced human system.

A_A OP , in is this the starting point of a new cosmology ?
@A_A@lemmy.world avatar

i cannot understand everything (far from it) but here is the part where I believe is an alternative explanation for the CMB :

Equations (2.38), (2.39), (2.40), and (2.53) all illustrate that the creation rate of particles with energies larger than the
inverse expansion time, ρ, is exponentially suppressed. Parker [11] has noted that these exponential factor are similar
to those which appear in thermal spectrum at finite temperature
.

count_of_monte_carlo Mod ,

So unfortunately the article they reference by Parker is paywalled. I have access but can’t share it easily. The article is essentially the foundation of quantum field theory in curved space time - in other words the genesis of the standard cosmological model. Cosmological particle production in an expanding universe isn’t an alternative to the Big Bang, it’s an essential part of it.

Leonard Parker’s work is summarized on his Wikipedia page. You can also read an interview with him on the arxiv

A_A OP ,
@A_A@lemmy.world avatar

Thanks for your input.

May I take another route and ask you what you know about the history of science ... about paradigm shifts ... and about how people very knowledgeable on the current paradigm cannot see (most of times historicaly) that a paradigm shift is about to happen ?

count_of_monte_carlo Mod ,

how people very knowledgeable on the current paradigm cannot see (most of times historicaly) that a paradigm shift is about to happen ?

I’m not sure I’d agree with that assessment. Generally a new model or understanding of physics arises because of known shortcomings in the current model. Quantum physics is the classic example that resolved a number of open problems at the time: the ultraviolet catastrophe in black body radiation, the photoelectric effect, and the interference pattern of the double slit experiment, among others. In the years leading up to the development of quantum theory, it was clear to everyone active in physics that something was missing from the current understanding of Newtonian/classical physics. Obviously it wasn’t clear what the solution was until it came about, but it was obvious that a shift was coming.

The same thing happened again with electroweak unification%20and%20the%20weak%20interaction.) and the standard model of particle physics. There were known problems with the previous standard model Lagrangian, but it took a unique mathematical approach to resolve many of them.

Generally research focuses on things that are unknown or can’t be explained by our current understanding of physics. The review article you linked, for example, details open questions and contradictory observations/predictions in the state of the art.

A_A OP ,
@A_A@lemmy.world avatar

Thanks again for your time and consideration.

We are discussing here in a community dedicated to science and clearly I have to acknowledge that your arguments here are much better than mine 😆 and that you are very knowledgeable in the current paradigm of science.

Unfortunately for me, there is no community at Lemmy dedicated to the history of science where "very knowledgeable on the current paradigm" would be so telling for historians knowledgeable in this field.

count_of_monte_carlo Mod ,

Unfortunately for me, there is no community at Lemmy dedicated to the history of science

I agree! The history of science is often even more interesting since you get both the science and the personalities of all the people involved, plus the occasional world war in the mix. It’s a shame there isn’t an “askhistorians” type community here.

threelonmusketeers ,

there is no community at Lemmy dedicated to the history of science

That seems like something @Sal might be able to fix...

AstridWipenaugh , in How long will the Great Lakes last?

42

slazer2au ,

Seconds? Years? Decades? Meters? AU?

Care to give a unit?

MisterChief ,

It's a joke. It's a reference to Hitchhiker's Guide to the Galaxy where the answer to the ultimate question is 42. It's designed to not make sense.

slazer2au ,

Yep. Which is why I said time and distance units.

MisterChief ,

Well woosh on me.

Everythingispenguins ,

The unit is 42

slazer2au ,

Oh, the unit is the universe.

Everythingispenguins ,

And the number too, much more efficient

someguy3 , in Does having fur help or hinder animals like otters/beavers/polar bears when they swim about?

Bit of a guess but I can only think hurts specifically for swimming. The fur is there to insulate when they are on land.

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...

https://www.wbir.com/article/news/health/child-faces-fatal-health-issues-after-simple-procedure/51-d9385f6b-f3f8-4c22-b0d4-72c2130f1d62

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

catloaf , in How does the impact of disposed rubber on the environment compare to plastics?

Rubber is just stretchy plastic. It has all the same problems.

Bookmeat , in Are there other human traits like light skin which people developed to adapt to the "new" environment they settled in?

Height, build, differentiation between sexes.

Atin ,

Sexual dimorphism has been in our genes well before the Homo genus has been around.

Bookmeat ,

I read the question as a difference of traits rather than whole new traits, if that makes any sense.

So my suggestion was that the strength of sexual dimorphism varies. That is, some ethnicities may have a very significant difference in appearance between sexes, but in other ethnicities the difference would be lessened.

artichokecustard ,

sure, how about some examples to consider?

  • All
  • Subscribed
  • Moderated
  • Favorites
  • random
  • [email protected]
  • All magazines