Recent comments in /f/askscience
MrDenly t1_j2c0kib wrote
Reply to comment by Aseyhe in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey
So Milky is not static and is rotating or moving away from big bang?
[deleted] OP t1_j2c0fkx wrote
Grinagh t1_j2bxeza wrote
Reply to comment by Navvana in Before Newton, how did people explain falling apples? by maugustus
Newton actually saw a limitation of his theory in the motion of mercury since it requires relativity to explain its motion.
[deleted] t1_j2bw9oc wrote
Reply to How much does the liquid magma of the Earth affect it's surface temperature? by tripperfunster
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kyler000 t1_j2bw3sk wrote
Reply to comment by r2k-in-the-vortex in How much does the liquid magma of the Earth affect it's surface temperature? by tripperfunster
Do you have more info on how volcanic carbon emissions affect foliage? It seems like there would still be plenty of carbon to go around and that volcanos just contribute more to the carbon cycle. Or is it part of the cycle? Like some carbon is sequestered due to tectonic activity and then released by volcanos?
majorpickle01 t1_j2bvhwy wrote
Reply to comment by CompactOwl in has the speed of light always been constant? by 2bornnot2b
from the very limited reading I've seen into the subject the idea is it would be detectable in the CMB - something along the lines is it would affect the distributions of bands or something like that.
If you do some digging for papers on it there's are suggestions on how to test for it / physical consequences
Bad_DNA t1_j2bvgh8 wrote
Reply to thermal expansion affecting climate change? by mjoninha
The source of the energy? The Sun. On many days, it will be a noticeable thermonuclear ball in the sky emitting no small amount of energy. That energy comes in many frequencies, some of which are absorbed by chemical compounds in our atmosphere and upon the surface of our planet.
[deleted] t1_j2btqaz wrote
Reply to comment by theCroc in Before Newton, how did people explain falling apples? by maugustus
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Josephdirte t1_j2btpn5 wrote
Reply to comment by wabalaba1 in How much does the liquid magma of the Earth affect it's surface temperature? by tripperfunster
Sorry if I'm missing something in your comment, but it seems to imply that the earth's core started out incredibly hot and has been cooling ever since without any additional heat generation, rather, relying on insulation to retain residual heat. It's important to note that ongoing radioactive decay within the earth's interior, together with the insulation you discussed, continues to keep earth's core hot and capable of sustaining plate tectonics.
[deleted] t1_j2bth4w wrote
Reply to comment by TychaBrahe in Before Newton, how did people explain falling apples? by maugustus
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Dd_8630 t1_j2bsp18 wrote
Reply to comment by [deleted] in Before Newton, how did people explain falling apples? by maugustus
>Some physicists are questioning if General Relativity is totally accurate.
No physicist has ever thought that GR is totally accurate, not even Einstein. We've known from the very beginning that GR and QM are incomplete.
>The simulation has limits so the extreme edges "break" the rules.
What rules does it break? The universe is under no obligation to obey human intuition.
>It is possible the universe is the same way...
That's absolutely nothing to suggest that it is. We humans evolved to have an intuitive understanding of the world we interact with; therefore, we should expect physics to diverge from our evolved intuition when we go beyond humans scales - namely, the very small, very large, very vast, very hot, very rarefied, etc. Go beyond STP and scales of metres and seconds, and we should expect to hit counterintuitive results.
It would be more indicative of a contrived simulation if we didn't encounter edge weirdness.
swampshark19 t1_j2brjyx wrote
Reply to comment by Aseyhe in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey
Is this related to gravitational potential being understood as negative energy?
[deleted] t1_j2bpa4p wrote
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TheActualUrtie t1_j2bofez wrote
Reply to comment by 97screamingcacti in If collagen is a protein, and proteins are broken down during digestion, why would collagen or collagen supplements be beneficial? Is it just hype? by skepticated
I am probably misunderstanding this, but isn't mad cow disease caused by a protein? How does that happen if they're always broken down?
mycatpeesinmyshower t1_j2bo11r wrote
Reply to comment by r2k-in-the-vortex in How much does the liquid magma of the Earth affect it's surface temperature? by tripperfunster
Also without magma moving iron around we wouldn’t have a magnetic flow and we’d be like Mars and lose all our atmosphere right?
[deleted] t1_j2bnnm4 wrote
Reply to comment by BillBigsB in Before Newton, how did people explain falling apples? by maugustus
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OlympusMons94 t1_j2bne1r wrote
Reply to comment by WarpingLasherNoob in How much does the liquid magma of the Earth affect it's surface temperature? by tripperfunster
No. An induced magnetosphere (like Venus, Mars, Europa, Titan, comets, etc. have) doesn't require or have anything to with the core. It just requires the presence of some kind of atmosphere, in which the magnetic field is to be induced.
An intrinsic magnetosphere (like the Sun, Ganymede, Earth, and the other five planets have) is by definition generated in the interior of a planet, and for rocky/terrestrial planets lile Earth and Mercury this would tend to be in the metallic core (as opposed to the rocky mantle). But gas giants and ice giants generate their intrinsic magnetic fields above their core. For example, Jupiter's and Saturn's magnetic fields are generated in their liquid metallic hydrogen mantles.
An "active core" isn't really a scientific term, and can have different meanings in popular discourse. The usual, better meaning is that there is an active dynamo in the core, generating an intrinsic planetary magnetic field. But the absence of an intrinsic magnetic field and the core therefore not being "active" in this way does not imply the core is solid (let alone not rotating; all cores rotate along with the rest of the planet). There needs to be additional forcing to generate a dynamo. (For example in the case of Earth's core, the freezing out of the inner core causes the outer core to convect. Planetary rotation twists this vertical convective motion into spirals and this combined motion drives the dynamo.)
Often, "active core" is instead or additionally taken to indicate or be synonymous with active volcanism or tectonics. But these are driven by processes in the mantle and crust, and not directly related to the core, let alone the magnetic field. So this idea of an "active core" is "not even wrong".
CatalyticDragon t1_j2bl2g5 wrote
Reply to comment by DooDooSlinger in If collagen is a protein, and proteins are broken down during digestion, why would collagen or collagen supplements be beneficial? Is it just hype? by skepticated
The second "study" was by a supplement company and used self reporting of pain (WOMAC). Zero evidence to suggest the collagen supplements drove that outcome.
Are the others any better?
cmparkerson t1_j2bkph9 wrote
The key to Newton wasnt just the theory, but the math that supported it. People used to say lots of different things about all sorts of Natural phenomena. Often with things like "Its Gods Will" Or some other divine or supernatural explanation.
[deleted] t1_j2bjs12 wrote
Reply to comment by BillBigsB in Before Newton, how did people explain falling apples? by maugustus
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[deleted] t1_j2bjlz0 wrote
Reply to comment by Verlepte in Before Newton, how did people explain falling apples? by maugustus
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[deleted] t1_j2biv73 wrote
Reply to comment by swollennode in How do shifts work on really long medical operations? by TerjiD
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[deleted] t1_j2bit9n wrote
BillBigsB t1_j2bipfx wrote
Reply to comment by atomfullerene in Before Newton, how did people explain falling apples? by maugustus
It was in Aristotles lifetime that the first greek was born to propose a heliocentric theory. I suggest you learn more about greek physics before you profound such errors.
[deleted] OP t1_j2c0rxl wrote
Reply to Was there a decrease in other infectious diseases other than Covid due to wearing masks during the past 2 years? by [deleted]
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