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Author Topic: Science Thread (and !!SCIENCE!! Thread!)  (Read 94659 times)

martinuzz

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #780 on: March 17, 2022, 01:31:16 pm »

Awesome video.
It's as if Fat Boy Slim and Einstürzende Neubauten had a baby
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http://www.bay12forums.com/smf/index.php?topic=73719.msg1830479#msg1830479

Scoops Novel

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #781 on: April 07, 2022, 08:54:26 pm »

"Scientists just outside Chicago have found that the mass of a sub-atomic particle is not what it should be.

The measurement is the first conclusive experimental result that is at odds with one of the most important and successful theories of modern physics."

https://www.bbc.co.uk/news/science-environment-60993523

The standard model is changing for the first time in 50 years.

"The result, published in the journal Science, could be related to hints from other experiments at Fermilab and the Large Hadron Collider at the Swiss-French border. These, as yet unconfirmed results, also suggest deviations from the Standard Model, possibly as a result of an as yet undiscovered fifth force of nature at play."
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Il Palazzo

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #782 on: April 08, 2022, 04:27:31 am »

The standard model is changing for the first time in 50 years.
Lord, do I hate making breaking news out of the scientific process. It's a 0.09% discrepancy in a single, just published study. Give the boffins some time to look it over before proclaiming a revolution.
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delphonso

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #783 on: April 08, 2022, 06:09:25 pm »

BURN YOUR SCIENCE TEXT BOOKS! THE MODEL IS CHANGING

Yeah, the standard model has been changing consistently - new discoveries and accommodations for such. It's got it's own holes already - something like this would just be another one. We need a new explanatory model before we can abandon the current one.

martinuzz

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #784 on: April 30, 2022, 08:02:45 am »

For anyone interested in theoretical physics and the universe, PBS space time is a great youtube series.

https://www.youtube.com/c/pbsspacetime
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Eric Blank

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #785 on: May 01, 2022, 11:08:30 pm »

Slow Mo Guys channel on youtube is surprisingly amusing source of useless trivia, such as cracks propagate through laminated glass at mach 4.2

Not peer reviewed by any means, and I certainly want more tests with more thicknesses, compositions and temperatures and various other information, I'd be keen to know if the rate of crack propagation matches the speed of sound/vibration traveling through the material, or what exact material properties determine it, but it is recorded and published in an easily consumable format.
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Starver

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #786 on: May 02, 2022, 03:42:37 am »

Yeah, if they're taking Mach 1 as 330m/s, or whatever they might be, they are missing the point that Mach numbers are calculated to the local speed of sound, which (for the material itself) is going to be higher than in air, and cracks can't propogate quicker than the neighbouring clumps of material realise there's some reason to crack (tied to, or below, the mechanical transmission rate, i.e. the speed of sound in glass).

It may be going faster than the signal pervades through the surrounding air, but the same effect could be seen by jolting a push-rod (without breaking it), which shoves mechanical effort 'instantaneously' from one end to the other at (if it's long and rigid enough to measure) faster speeds than an audio signal can propogate in the surrounding it.

I think this 'superluminal'-analogue is what causes the distinctive 'twang' of a metal pole (or rail) being struck at one end, the in-material transmission of sound creating a strangely rapid (to our ears) transmission of a coherent wave to all points on the length, to then become a line-source of very-nearly-in-phase air-transmitted sound that disobeys most of our mental expectations from echoes and other indirect sound that we normally would be able to pinpoint to an origin through quite obvious (to our auditory processing neurons, if not consciously) principle of first-detrction and allowance for secondary arrivals. (Instead of hearing the emination from the nearest bit of rod before the air-only sound comes from the further away bit of rod that was actually struck first.)


That said, I'm sure I'll like the video, but it is a measurement failure. I can move faster than light, if you get me a (very long!) coil of fibre-optic to shine the light down whilst I simply step from the first exposed end to the second, with a not too dissimilar claim that I can thus exceed c. ;)
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McTraveller

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #787 on: May 02, 2022, 06:49:53 am »

That's interesting actually. It may not be an error.  Consider that the speed of sound in a material is the propagation rate of pressure disturbances; it's not the max rate of speed of the propagation of "anything" in the material.

We have supersonic aircraft, which "crack" the air and generate shocks ("shock waves") and expansion waves.  A crack in a solid material, not being a result of pressure gradient in the direction of propagation, may be more like an intrusion into the material and so may in fact be able to propagate faster than the speed of sound in the material; the crack may be the equivalent of the shock in air and so can in fact travel "faster than sound".

I want more info!
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Starver

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #788 on: May 02, 2022, 07:50:50 am »

As would I. But a crack is an absence, where the substrate has dislocated apart. I suspect that anything.not being actively progressively driven apart by a separate (locally-supersonic) additional thing (e.g. a supersonic (even hypersonic, wr.t. air) penetrating projectile, or by the detonation of a faster-propogating explosive material prepared as an intrusion already... either of which I would say are cheating in this scenario) is entirely dependant upon how quickly one atom in the (amorphous?) mass is sufficiently displaced by the prior atom(s) having been displaced, which has its limit to something like that of the internal "speed of sound".

Obviously if you strike the first atoms enought to excite them onwards at 'unnatural' velocities into the next atoms, it'll be like the penetrator, but as soon as the effect translates to cracking (especially lateral displacement, breaking any high-tension bonds and allowing high-compression bonds to get their desired breathing space) the 'information' speed limit is essentially sonic-limited. Or, rather, sound in the material is just the same thing but (usually) beneath the failure/assymetric stress relaxation level.


But I'm more familiarvwith metals, and laminated glass poses kther issues (does the lamination-bonder effectively act as a 2D molecule, chanelling failure-level stresses faster, in its own higher-than-glass 'local' speed of sound, and the propogation decays inversely rather than inverse-squaredly, as a price to be paid for having up until then withstood far more stress than the unlaminated equivalent glass). And if it's more that 'soake up' overdamage finally gets released by the final criticality of failure, the question still remains how the coordinationis achieved to fail (apparently sequentially) at a rate of inter-zone 'messaging' that exceeds the usual force-transfer. (Possibility: the molecular forces  trip' the next atom along, not just the adjacent one, because of the extraordinary crystal-breaking effect. But I can't see it being coherent enough to trigger an 'unzip', at best an audio version of Cherenkov Radiation just... doing I don't know ehat.)


((Not claiming Materials Science expertise on this one. Not if it gets beyond your basic metallic ductility, anyway. Just my first thoughts on the subject.))
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Eric Blank

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #789 on: May 12, 2022, 04:29:54 pm »

Sagittarius a, the black hole at the center of the milkyway, has been imaged using the same technique as was used to image M87

https://www.eso.org/public/blog/spot-the-difference-sagittarius-a-m87/

https://mobile.twitter.com/NASA/status/1524744614623821824?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Etweet
« Last Edit: May 12, 2022, 04:52:23 pm by Eric Blank »
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Loud Whispers

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #790 on: May 19, 2022, 01:43:05 pm »

Sagittarius a, the black hole at the center of the milkyway, has been imaged using the same technique as was used to image M87

https://www.eso.org/public/blog/spot-the-difference-sagittarius-a-m87/

https://mobile.twitter.com/NASA/status/1524744614623821824?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Etweet
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Duuvian

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #791 on: December 27, 2023, 05:00:32 am »

https://www.politico.eu/article/europe-is-spending-millions-to-trap-carbon-where-will-it-go/
https://www.cnn.com/2023/12/16/climate/solution-hot-rocks-renewable-energy-battery/index.html

Is the captured carbon suitable for the purpose of a thermal battery (which in the article uses graphite)? Inside a battery may be a fine storage solution. I'm not sure what the plans for storing a metric butt-ton of carbon are, but it seems like dumping it into industrial batteries could generate money through cost-savings over time for those businesses rather than storage costs for whoever is paying for rent and/or maintenence of the carbon storage even if that part were to be pretty cheap and easy.
« Last Edit: December 27, 2023, 05:04:46 am by Duuvian »
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Loud Whispers

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #792 on: December 27, 2023, 07:50:51 pm »

https://www.politico.eu/article/europe-is-spending-millions-to-trap-carbon-where-will-it-go/
https://www.cnn.com/2023/12/16/climate/solution-hot-rocks-renewable-energy-battery/index.html

Is the captured carbon suitable for the purpose of a thermal battery (which in the article uses graphite)? Inside a battery may be a fine storage solution. I'm not sure what the plans for storing a metric butt-ton of carbon are, but it seems like dumping it into industrial batteries could generate money through cost-savings over time for those businesses rather than storage costs for whoever is paying for rent and/or maintenence of the carbon storage even if that part were to be pretty cheap and easy.
Turn it into vodka?

Tbh best thing we could do is preserve our bogs

Duuvian

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #793 on: December 30, 2023, 06:48:46 am »

Tbh best thing we could do is preserve our bogs

Yes

The coal of the future

What's going on with the bogs?
« Last Edit: December 30, 2023, 06:50:46 am by Duuvian »
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Loud Whispers

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Re: Science Thread (and !!SCIENCE!! Thread!)
« Reply #794 on: January 01, 2024, 11:17:04 pm »

Yes

The coal of the future

What's going on with the bogs?

Surprisingly good at capturing carbon

Known peatlands only cover about 3% of the world’s land surface, but store at least twice as much carbon as all of Earth’s standing forests.

Also a lot more reliable than arborial carbon credit schemes, which kinda miss the point that a planted tree will die and release the carbon back. So quantity of trees is less important than the integrity and size of an ecosystem
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