A rock is dropped from a tower one Earth's radius high and observed in the frame of the tower. Perhaps surprisingly the rock doesn't fall at the base of the tower. Ignoring atmospheric resistance it lands about 550 km to the East. This is because points closer to the axis move slower and the rock overtakes them. This is Coriolis force, which is not a force of interaction like gravity is. It's a consequence of observing a motion in the rotating frame of the Earth.
When your predators use echolocation to locate you, it pays to have an ultrasonic deterrence. So, many species of ermine moths have structures on their wings known as tymbals. (Image credit: Wikimedia/entomart; research credit: H. Mendoza Nava et al.; via APS Physics)
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The potential of quantum computing is immense, but the distances over which entangled particles can reliably carry information remains a massive hurdle. The tiniest of disturbances can make a scrambled mess of their relationship.
To circumvent the problem, quantum computing researchers have found ways to stabilize long lengths of optical fibers or used satellites to preserve signals through the near-vacuum of space.
look, I know I've talked about this essay (?) before but like,
If you ever needed a good demonstration of the quote "Any sufficiently advanced technology is indistinguishable from magic", have I got an exercise for you.
Somebody made a small article explaining the basics of atomic theory but it's written in Anglish. Anglish is basically a made-up version of English where they remove any elements (words, prefixes, etc) that were originally borrowed from romance languages like french and latin, as well as greek and other foreign loanwords, keeping only those of germanic origin.
What happens is an english which is for the most part intelligible, but since a lot everyday english, and especially the scientific vocabulary, has has heavy latin and greek influence, they have to make up new words from the existing germanic-english vocabulary. For me it kind of reads super viking-ey.
Anyway when you read this article on atomic theory, in Anglish called Uncleftish Beholding, you get this text which kind of reads like a fantasy novel. Like in my mind it feels like it recontextualizes advanced scientific concepts to explain it to a viking audience from ancient times.
Even though you're familiar with the scientific ideas, because it bypasses the normal language we use for these concepts, you get a chance to examine these ideas as if you were a visitor from another civilization - and guess what, it does feel like it's about magic. It has a mythical quality to it, like it feels like a book about magic written during viking times. For me this has the same vibe as reading deep magic lore from a Robert Jordan book.
To 3D print with fiber-infused liquids, we need to understand how these drops form, break-up, and splash. That's the subject of this research poster, which shows drops of a fiber suspension forming and pinching off along the top of the image. (Image credit: S. Rajesh and A. Sauret; via GoSM)
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Things my extremely Italian physics professor has said:
“If you are walking in the woods nearby Chernobyl, you will probably be fine. But if you pick something up off the ground and eat it, you will die of radiation poisoning. Of course you may die if you eat things from the ground in other places, also, but likely not of radiation.”
“Unfortunately there is nothing I can teach you that will prevent you dying if there is on your house a hydrogen bomb. That is a politician problem. If any of you are president later, please do not hydrogen bomb my house.”
“Radioactivity could perhaps be used by terrorists, but it has not yet. Likely this is because terrorists do not study much physics.”
“Why is it that physics graduate students cannot make a nuclear bomb? It is not that they do not want to. They simply have not the money to buy the materials. Or anything else.”
‘Love is the one thing that we’re capable of perceiving that transcends dimensions of time and space.’
“Eulogy from a Physicist” by Aaron Freeman, with quotes from Interstellar by Christopher Nolan, and images from NASA, Interstellar, Getty, Petrichara, and Reuters.
1- NASA: GOODS-South.
2- NASA: NGC 1850.
3- NASA: Iberian Peninsula.
4- Christopher Nolan: Interstellar.
5- NASA: From the Earth to the Moon.
6- Hannah La Folette Ryan: Subway Hands.
7- Adams Evans: Heart Nebula.
8- NASA: Exploring the Antennae.
9- NASA: Crescent Moon from the International Space Station.
The long wavelengths of the light spectrum—red, yellow, and orange—can penetrate to approximately 15, 30, and 50 meters (49, 98, and 164 feet), respectively, while the short wavelengths of the light spectrum—violet, blue and green—can penetrate further, to the lower limits of the euphotic zone. Blue penetrates the deepest, which is why deep, clear ocean water and some tropical water appear to be blue most of the time. Moreover, clearer waters have fewer particles to affect the transmission of light, and scattering by the water itself controls color. Water in shallow coastal areas tends to contain a greater amount of particles that scatter or absorb light wavelengths differently, which is why sea water close to shore may appear more green or brown in color.
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