Current Entries
---------------
07/27/2023 Why some alloys do not expand as the temperature increases:
https://phys.org/news/2023-07-alloys-dont-size.html
"There is ... a class of metal alloys called Invars ...
that stubbornly refuse to change in size and density over
a large range of temperatures. ... At cooler
temperatures, ... [an] Invar's electrons share[] the same
spin state, causing them to move farther apart and
push[ing] their parent atoms farther apart as well. As
the temperature of the Invar r[ises], the spin state of
some of [its] electrons increasingly flip[]. As a result,
the electrons bec[o]me more comfortable cozying up to
their neighboring electrons. Typically, this would cause
the Invar to contract as it warm[s] up. But [because] the
Invar's atoms [a]re also vibrating more and taking up more
room. The contraction due to changing spin states and the
atomic vibration expansion counteract[] each other, and
the Invar stay[s] the same size."
07/27/2023 A pair of new tetraquarks:
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.041902
https://physics.aps.org/articles/v16/s42
"In the past two decades, dozens of tetraquark candidates
have been observed at the LHC and elsewhere. The newly
discovered states stand out, as they are rare examples of
'open-charm' mesons, in which a charm quark is present
without a corresponding charm antiquark."
07/27/2023 Classic sibling arguments:
https://www.hedgerhumor.com/wp-content/uploads/2023/07/Siblings-Thinking-Hedger.jpg
https://www.hedgerhumor.com/national-siblings-day-2/
07/23/2023 Slice onions pole to pole to reduce eye watering:
https://laughingsquid.com/how-to-cut-onion/
"The key sulfur product in the onion is called the
lacrimator and this is released when we cut them.
It is also the chemical responsible for making our eyes
water ... onion cells are not symmetrical they're
actually longer in pole-to-pole than orbital, meaning
that orbital cuts rupture more onion cells releasing
more lacrimators, meaning more eye watering[.]"
07/23/2023 Command hashing in shells is probably not needed anymore:
https://utcc.utoronto.ca/~cks/space/blog/unix/DropShellCommandHashing
07/22/2023 Stargate Paris:
https://m.youtube.com/watch?v=mTJpUsHa7Eg
07/22/2023 "Dark Oxygen":
https://www.quantamagazine.org/underground-cells-make-dark-oxygen-without-light-20230717/
"[A] type of methane-feeding bacteria often found in lake
sediments and wastewater sludges ha[ve] a strange way of
life. Instead of taking in oxygen from its surroundings
like other aerobes, the bacteria create[ their] own oxygen
by using enzymes to break down the soluble compounds called
nitrites (which contain a chemical group made of nitrogen
and two oxygen atoms). The bacteria use[] the self-generated
oxygen to split methane for energy. ... When microbes break
down compounds this way, it'''s called dismutation. Until now,
it was thought to be rare in nature as a method for
generating oxygen. Recent laboratory experiments involving
artificial microbe communities, however, revealed that the
oxygen produced by dismutation can leak out of the cells and
into the surrounding medium to the benefit of other oxygen-
dependent organisms, in a kind of symbiotic process."
07/17/2023 Underwater ears:
https://computer.rip/2023-07-15-underwater-ears-everywhere.html
07/14/2023 Requiem for the Foghorn:
https://nautil.us/requiem-for-the-foghorn-353787/
The Ray Bradbury quote "It sounds like an animal,
don't it" matches my memory of the San Francisco
bay fog horn - it sounds like the worlds largest
goose.
07/13/2023 New study confirms that mass is mass:
https://www.sciencenews.org/article/mass-moon-orbit-gravity-space
https://physics.aps.org/articles/v16/s97
Angela Collier has a great related video:
https://m.youtube.com/watch?v=6HlCfwEduqA
07/13/2023 Caterham Project V:
https://uncrate.com/caterham-project-v-electric-sports-car/
07/13/2023 The rings and bar of NGC 1398:
https://apod.nasa.gov/apod/ap230712.html
"Spiral galaxy NGC 1398 not only has a ring of pearly
stars, gas and dust around its center, but a bar of stars
and gas across its center, and spiral arms that appear
like ribbons farther out. ... The ring near the center is
likely an expanding density wave of star formation, caused
either by a gravitational encounter with another galaxy,
or by the galaxy's own gravitational asymmetries."
07/13/2023 Magnet Detectives:
https://www.symmetrymagazine.org/article/the-magnet-detectives
07/13/2023 Hex-Chess:
https://www.youtube.com/watch?v=bgR3yESAEVE
07/13/2023 The shiniest known exoplanet:
https://www.smithsonianmag.com/smart-news/this-mirror-like-exoplanet-is-the-most-reflective-ever-discovered-180982522/
https://www.sci.news/astronomy/cheops-metal-clouds-atmosphere-ultrahot-neptune-12078.html
"[E]xoplanet LTT 9779b reflects 80% of the light shone on
it by its host star, LTT 9779, making it the shiniest
exoplanet ever found. The reason for its high reflectivity
is that it is covered by reflective clouds of metal and
silicate."
07/08/2023 Nancy Drew 34 - Mystery of the Seven Keys:
https://m.youtube.com/watch?v=JWp_zCEZ8pQ
Looking forward to this.
07/06/2023 Electrons are "really, really round":
https://www.sciencenews.org/article/electron-round-new-measurement-matter-physics
https://phys.org/news/2023-07-roundness-electrons-clues.html
Earlier Entries
---------------
06/##/2023 https://srirangav.github.io/motd/2023/06/motd.txt
https://srirangav.github.io/motd/2023/06/index.html
05/##/2023 https://srirangav.github.io/motd/2023/05/motd.txt
https://srirangav.github.io/motd/2023/05/index.html
04/##/2023 https://srirangav.github.io/motd/2023/04/motd.txt
https://srirangav.github.io/motd/2023/04/index.html
03/##/2023 https://srirangav.github.io/motd/2023/03/motd.txt
https://srirangav.github.io/motd/2023/03/index.html
02/##/2023 https://srirangav.github.io/motd/2023/02/motd.txt
https://srirangav.github.io/motd/2023/02/index.html
01/##/2023 https://srirangav.github.io/motd/2023/01/motd.txt
https://srirangav.github.io/motd/2023/01/index.html
##/##/2022 https://srirangav.github.io/motd/2022/motd.txt
https://srirangav.github.io/motd/2022/index.html