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#physics

114 posts96 participants14 posts today
Public
Ethan Siegel

Why nuclear reactions on an exoplanet won’t imply alien life Someday, intelligent aliens will invent nuclear reactors, producing a characteristic antineutrino signature. But detecting those antineutrinos won't necessarily mean aliens. Here's why. bigthink.com/starts-with-... #space #physics

Why nuclear reactions on an ex...

Big ThinkWhy nuclear reactions on an exoplanet won't imply alien lifePlanets can create nuclear power on their own, naturally, without any intelligence or technology. Earth already did: 1.7 billion years ago.
Public
Nicole Sharp

Atmospheric Rivers Raise Temperatures

Atmospheric rivers are narrow streams of moisture-rich air running from tropical regions to mid- or polar latitudes. Though relatively short-lived, they are capable of carrying — and depositing — more water than the largest rivers. But researchers have found that their impact is not measured in water content alone. Instead, a survey of 43 years’ worth of data shows that atmospheric rivers also bring unusually warm temperatures. In some cases, the authors found surface temperatures near an atmospheric river climbed to as high as 15 degrees Celsius above the typical. On average, temperatures were about 5 degrees Celsius higher than expected for the region’s climate.

Several factors raise those temperatures — like the heat released when rising vapor meets cooler air and condenses into liquid — but the biggest effect came from carrying warm tropical temperatures to (usually) cooler regions. (Image credit: L. Dauphin/NASA; research credit: S. Scholz and J. Lora; via Physics Today)

#atmosphericRiver#atmosphericScience#fluidDynamics
Public
The Kid Should See This 🌈🪐✨

In a meticulous Rube Goldberg machine, Joseph Herscher transforms ordinary objects like mushrooms, laptops, and apples into an intricate chain of motion. The creator spent ten takes perfecting the sequence, particularly struggling with a mushroom that kept changing its roll, ultimately demonstrating the patience and precision required to bring such a mechanical performance to life. 🥕⚙️

👉 Learn more: thekidshouldseethis.com/post/p
#engineering #food #physics #tksst #video

Public
ned haughton

This is a really cool read. Not entirely sure if there are any practical implications, except that maybe we humans should stop trying to look for simplifying narratives everywhere and start appreciating and embracing diversity in everything.

Oh, I guess that's practical..

quantamagazine.org/why-everyth

Quanta Magazine · Why Everything in the Universe Turns More Complex | Quanta MagazineA new suggestion that complexity increases over time, not just in living organisms but in the nonliving world, promises to rewrite notions of time and evolution.
#complexity#systemsThinking#science
Public
safest_integer

It takes about 1 hour to charge my phone with a 5W charger, so 0.005kWh total energy. With that amount of energy I can run my 10kW electric shower for 1.8 seconds!

The energy I use for a single hot shower is enough to charge my phone daily for a year.

Simple calculations like these need to be taught in schools. Then maybe we wouldn't waste time lecturing people on nonsense like "always unplug your charger to save energy".

#energy#science#physics
Continued thread
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Khurram Wadee ✅

A subtlety probably difficult to spot in the animation is that the interaction of the two waves leaves them phase shifted, with the taller wave gaining position, while the shorter one loses it. This further animation shows the interactions again (purple) but I’ve also shown what would happen if each wave moved without interaction with the other (red and blue).

#Animation#Mathematics#AppliedMathematics
Continued thread
Public
Khurram Wadee ✅

When you start looking at #NonlinearWaves, some of these principles no longer apply. For example, in the Korteweg-de Vries equation, which has #Soliton or solutions, you can no longer simply add two solutions together as the resulting function would not be a solution of the governing equation. Waves of different heights travel at different velocities, with the taller waves moving faster than the shorter ones. Instead, they interact #nonlinearly.

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#Mathematics#AppliedMathematics#Physics
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