Manfred Frischholz
@manfredfrischholz.bsky.social
Physiker und Lehrer aus Überzeugung, bibliophil, geschichtsinteressiert, Judoka, Werderfan, tech nerd, trekkie, ...
Just one point from two home games within a week is simply not enough!
January 19, 2025 at 10:02 PM
Just one point from two home games within a week is simply not enough!
Reposted by Manfred Frischholz
[Turn the sound on if you like joy.]
January 6, 2025 at 4:48 PM
[Turn the sound on if you like joy.]
Reposted by Manfred Frischholz
Physicist Marguerite Perey discovered Francium #OTD in 1939. It was the last element to be found in a naturally occurring state, rather than synthesized by humans. 🧪 ⚛️ 👩🔬
Image: Musée Curie/ACJC Collection
Image: Musée Curie/ACJC Collection
January 7, 2025 at 2:56 PM
Physicist Marguerite Perey discovered Francium #OTD in 1939. It was the last element to be found in a naturally occurring state, rather than synthesized by humans. 🧪 ⚛️ 👩🔬
Image: Musée Curie/ACJC Collection
Image: Musée Curie/ACJC Collection
Reposted by Manfred Frischholz
The @esa.int Gaia satellite will take its final scientific measurements on Wednesday. 🔭
This will conclude a 12 year series of continuous observations.
Larger Gaia data releases are still in progress, but Gaia has already had a HUGE impact on our understanding of the #milkyway.
(Image: ESA)
This will conclude a 12 year series of continuous observations.
Larger Gaia data releases are still in progress, but Gaia has already had a HUGE impact on our understanding of the #milkyway.
(Image: ESA)
January 12, 2025 at 5:25 PM
Reposted by Manfred Frischholz
January 12, 2025 at 4:27 PM
Reposted by Manfred Frischholz
Paul Dirac's paper "The Quantum Theory of the Electron," in which he derived the relativistic equation for spin 1/2 particles like the electron, was submitted #OTD in 1928.
It’s one of the most important results of 20th century physics, taking the deceptively simple form:
i ℏ γ.∂ψ - m c ψ = 0
🧪 ⚛️
It’s one of the most important results of 20th century physics, taking the deceptively simple form:
i ℏ γ.∂ψ - m c ψ = 0
🧪 ⚛️
January 2, 2025 at 5:27 PM
Paul Dirac's paper "The Quantum Theory of the Electron," in which he derived the relativistic equation for spin 1/2 particles like the electron, was submitted #OTD in 1928.
It’s one of the most important results of 20th century physics, taking the deceptively simple form:
i ℏ γ.∂ψ - m c ψ = 0
🧪 ⚛️
It’s one of the most important results of 20th century physics, taking the deceptively simple form:
i ℏ γ.∂ψ - m c ψ = 0
🧪 ⚛️
Reposted by Manfred Frischholz
What a year 2024 has been! 🎉
Before we jump to the new one we took a look back at all the incredible things that happened this year - and put a small selection of them together here:
cms.cern/news/cms-wra...
Before we jump to the new one we took a look back at all the incredible things that happened this year - and put a small selection of them together here:
cms.cern/news/cms-wra...
December 30, 2024 at 3:53 PM
What a year 2024 has been! 🎉
Before we jump to the new one we took a look back at all the incredible things that happened this year - and put a small selection of them together here:
cms.cern/news/cms-wra...
Before we jump to the new one we took a look back at all the incredible things that happened this year - and put a small selection of them together here:
cms.cern/news/cms-wra...
Reposted by Manfred Frischholz
Eine interessante Frage für den Silvesterabend:
Klingen volle Sektgläser beim Anstoßen höher oder tiefer als leere Sektgläser?
Und woran liegt das?
Die Antworten geben Schülerinnen und Schüler eines Physik-Leistungskurses in Form eines genialen Erklärvideos:
youtu.be/d7la1jphuJI
Klingen volle Sektgläser beim Anstoßen höher oder tiefer als leere Sektgläser?
Und woran liegt das?
Die Antworten geben Schülerinnen und Schüler eines Physik-Leistungskurses in Form eines genialen Erklärvideos:
youtu.be/d7la1jphuJI
Zauber der Weihnachtszeit: Die Sektglas-Musik-Eisenbahn // Physik-Projekt III
YouTube video by Physik am Friedrich-Gymnasium Freiburg
youtu.be
December 29, 2024 at 3:12 PM
Eine interessante Frage für den Silvesterabend:
Klingen volle Sektgläser beim Anstoßen höher oder tiefer als leere Sektgläser?
Und woran liegt das?
Die Antworten geben Schülerinnen und Schüler eines Physik-Leistungskurses in Form eines genialen Erklärvideos:
youtu.be/d7la1jphuJI
Klingen volle Sektgläser beim Anstoßen höher oder tiefer als leere Sektgläser?
Und woran liegt das?
Die Antworten geben Schülerinnen und Schüler eines Physik-Leistungskurses in Form eines genialen Erklärvideos:
youtu.be/d7la1jphuJI
Reposted by Manfred Frischholz
A new claim that dark energy isn’t necessary, we just need to properly account for inhomogeneities in the universe. Maybe. But his idea has been discussed for a long time - David Wiltshire, an author here, has been pushing it for 20 years, and others have also looked at it. (1/n)
Astrophysics! What are your hot takes on this? I’m stuck at the airport and want to fight about space.
www.sci.news/astronomy/da...
www.sci.news/astronomy/da...
Dark Energy is Misidentification of Variations in Kinetic Energy of Universe’s Expansion, Scientists Say | Sci.News
Dark energy -- an unknown energy source that is causing our Universe’s expansion to accelerate – doesn’t actually exist, according to new research.
www.sci.news
December 27, 2024 at 2:40 PM
A new claim that dark energy isn’t necessary, we just need to properly account for inhomogeneities in the universe. Maybe. But his idea has been discussed for a long time - David Wiltshire, an author here, has been pushing it for 20 years, and others have also looked at it. (1/n)
Reposted by Manfred Frischholz
Mathematician, physicist, and computer scientist, the great polymath (omnimath is more like it) John von Neumann was born #OTD in 1903.
He considered his quantum mechanics contributions to be most important. To get a sense of the breadth of his work look at his Wikipedia “known for” list. 🧪 ⚛️ 💻 🧮
He considered his quantum mechanics contributions to be most important. To get a sense of the breadth of his work look at his Wikipedia “known for” list. 🧪 ⚛️ 💻 🧮
December 28, 2024 at 2:10 PM
Mathematician, physicist, and computer scientist, the great polymath (omnimath is more like it) John von Neumann was born #OTD in 1903.
He considered his quantum mechanics contributions to be most important. To get a sense of the breadth of his work look at his Wikipedia “known for” list. 🧪 ⚛️ 💻 🧮
He considered his quantum mechanics contributions to be most important. To get a sense of the breadth of his work look at his Wikipedia “known for” list. 🧪 ⚛️ 💻 🧮
Reposted by Manfred Frischholz
Eine der schönsten Beschäftigungen überhaupt: Einen Spaziergang zur Buchhandlung des Vertrauens machen um ein Buch zu kaufen - und dabei noch nicht zu wissen, welches es sein könnte.
December 27, 2024 at 11:16 AM
Eine der schönsten Beschäftigungen überhaupt: Einen Spaziergang zur Buchhandlung des Vertrauens machen um ein Buch zu kaufen - und dabei noch nicht zu wissen, welches es sein könnte.
Reposted by Manfred Frischholz
2024 will be the second straight "hottest year" on record.
People around the world suffered an average of 41 extra days of dangerous heat this year because of climate change.
People around the world suffered an average of 41 extra days of dangerous heat this year because of climate change.
2024 was alarmingly hot all over the world
Scientists don't fully understand why it surpassed previous years by such a wide margin.
www.axios.com
December 27, 2024 at 2:45 PM
2024 will be the second straight "hottest year" on record.
People around the world suffered an average of 41 extra days of dangerous heat this year because of climate change.
People around the world suffered an average of 41 extra days of dangerous heat this year because of climate change.
Reposted by Manfred Frischholz
A team led by physicist Chien-Shiung Wu obtained the first experimental confirmation of “parity violation,” in the decay of Cobalt-60, #OTD in 1956.
Her theory colleagues received a Nobel for the prediction, but she was left off the prize. 🧪 ⚛️ 👩🔬
Image: Smithsonian Institution Archives
Her theory colleagues received a Nobel for the prediction, but she was left off the prize. 🧪 ⚛️ 👩🔬
Image: Smithsonian Institution Archives
December 27, 2024 at 3:56 PM
A team led by physicist Chien-Shiung Wu obtained the first experimental confirmation of “parity violation,” in the decay of Cobalt-60, #OTD in 1956.
Her theory colleagues received a Nobel for the prediction, but she was left off the prize. 🧪 ⚛️ 👩🔬
Image: Smithsonian Institution Archives
Her theory colleagues received a Nobel for the prediction, but she was left off the prize. 🧪 ⚛️ 👩🔬
Image: Smithsonian Institution Archives
Reposted by Manfred Frischholz
Millions have been watching 'La Palma' on Netflix, featuring a tsunami washing over the Canary Islands. 🌊
A scenario with much science behind it, given the risk of collapse of a flank of the Cumbre Vieja volcano. Ocean model simulation of Abadie et al: agupubs.onlinelibrary.wiley.com/doi/epdf/10....
A scenario with much science behind it, given the risk of collapse of a flank of the Cumbre Vieja volcano. Ocean model simulation of Abadie et al: agupubs.onlinelibrary.wiley.com/doi/epdf/10....
December 26, 2024 at 5:05 PM
Millions have been watching 'La Palma' on Netflix, featuring a tsunami washing over the Canary Islands. 🌊
A scenario with much science behind it, given the risk of collapse of a flank of the Cumbre Vieja volcano. Ocean model simulation of Abadie et al: agupubs.onlinelibrary.wiley.com/doi/epdf/10....
A scenario with much science behind it, given the risk of collapse of a flank of the Cumbre Vieja volcano. Ocean model simulation of Abadie et al: agupubs.onlinelibrary.wiley.com/doi/epdf/10....
Reposted by Manfred Frischholz
Mathematician John Conway was born #OTD in 1937. 🧪
He made broad and profound contributions across all of mathematics, but he is maybe best known by the general public for his "game of life" cellular automaton.
Conway passed away in 2020, from COVID-19.
He made broad and profound contributions across all of mathematics, but he is maybe best known by the general public for his "game of life" cellular automaton.
Conway passed away in 2020, from COVID-19.
a black background with a pattern of white squares that says ' i ' on it
Alt: A gif of Conway’s “Game of Life” cellular automata.
media.tenor.com
December 26, 2024 at 4:45 PM
Mathematician John Conway was born #OTD in 1937. 🧪
He made broad and profound contributions across all of mathematics, but he is maybe best known by the general public for his "game of life" cellular automaton.
Conway passed away in 2020, from COVID-19.
He made broad and profound contributions across all of mathematics, but he is maybe best known by the general public for his "game of life" cellular automaton.
Conway passed away in 2020, from COVID-19.
Scientists modeled Santa’s epic Christmas journey: delivering to 300M households across 144M km in 35 hours.
Traveling at 8.2M km/h (0.8% of light speed), Rudolph’s nose could shift colors due to the Doppler effect—a festive blend of physics and magic!
tinyurl.com/yajbsbst
Traveling at 8.2M km/h (0.8% of light speed), Rudolph’s nose could shift colors due to the Doppler effect—a festive blend of physics and magic!
tinyurl.com/yajbsbst
I’ve calculated Santa’s speed on Christmas Eve – and this is what it would do to Rudolph’s nose
Strap into your sleigh for some Christmas physics fun with Rudolph the ‘redshifted’ reindeer.
tinyurl.com
December 26, 2024 at 9:08 AM
Scientists modeled Santa’s epic Christmas journey: delivering to 300M households across 144M km in 35 hours.
Traveling at 8.2M km/h (0.8% of light speed), Rudolph’s nose could shift colors due to the Doppler effect—a festive blend of physics and magic!
tinyurl.com/yajbsbst
Traveling at 8.2M km/h (0.8% of light speed), Rudolph’s nose could shift colors due to the Doppler effect—a festive blend of physics and magic!
tinyurl.com/yajbsbst
Reposted by Manfred Frischholz
The physics of a spinning dreidel is quite a bit different in the microgravity environment of the International Space Station, as demonstrated by astronaut Jasmin Moghbeli. 🧪
December 26, 2024 at 3:42 AM
The physics of a spinning dreidel is quite a bit different in the microgravity environment of the International Space Station, as demonstrated by astronaut Jasmin Moghbeli. 🧪
Reposted by Manfred Frischholz
The Apollo 8 astronauts performed lunar orbit insertion #OTD in 1968.
Frank Borman, Jim Lovell, and Bill Anders became the first humans to orbit the Moon, the first to see an Earthrise, fifty six years ago today. 🧪 🔭
Image: NASA
Frank Borman, Jim Lovell, and Bill Anders became the first humans to orbit the Moon, the first to see an Earthrise, fifty six years ago today. 🧪 🔭
Image: NASA
December 24, 2024 at 3:25 PM
The Apollo 8 astronauts performed lunar orbit insertion #OTD in 1968.
Frank Borman, Jim Lovell, and Bill Anders became the first humans to orbit the Moon, the first to see an Earthrise, fifty six years ago today. 🧪 🔭
Image: NASA
Frank Borman, Jim Lovell, and Bill Anders became the first humans to orbit the Moon, the first to see an Earthrise, fifty six years ago today. 🧪 🔭
Image: NASA
Reposted by Manfred Frischholz
An AI system has reached human level on a test for ‘general intelligence’. Here’s what that means
An AI system has reached human level on a test for ‘general intelligence’. Here’s what that means
OpenAI’s o3 model scored at human level on a benchmark test for artificial general intelligence – far higher than any results before.
theconversation.com
December 24, 2024 at 6:33 PM
An AI system has reached human level on a test for ‘general intelligence’. Here’s what that means
Reposted by Manfred Frischholz
Earlier today, the Parker Solar Probe set two space records: closest approach to the Sun, and fastest-ever human object, hitting a speed of 191 km/sec. 🧪
parkersolarprobe.jhuapl.edu
parkersolarprobe.jhuapl.edu
December 24, 2024 at 8:57 PM
Earlier today, the Parker Solar Probe set two space records: closest approach to the Sun, and fastest-ever human object, hitting a speed of 191 km/sec. 🧪
parkersolarprobe.jhuapl.edu
parkersolarprobe.jhuapl.edu
PiA® - Physik im Advent® 2024 - Kettenreaktion, chain reaction
YouTube video by Physik im Advent
youtu.be
December 24, 2024 at 6:31 PM
Reposted by Manfred Frischholz
A complete collection of free, high resolution, downloadable images of all 88 western IAU-recognized #constellations was released today: noirlab.edu/public/news/... - the project also includes the release of the largest open-source, freely available all-sky photo of the night sky.
December 23, 2024 at 10:01 PM
A complete collection of free, high resolution, downloadable images of all 88 western IAU-recognized #constellations was released today: noirlab.edu/public/news/... - the project also includes the release of the largest open-source, freely available all-sky photo of the night sky.
Reposted by Manfred Frischholz
Atlantic Ocean is headed for a tipping point − once melting glaciers shut down the Gulf Stream, we would see extreme climate change within decades, study shows https://buff.ly/4gseFPC 🌎
Atlantic Ocean is headed for a tipping point − once melting glaciers shut down the Gulf Stream, we would see extreme climate change within decades, study shows
Scientists now have a better understanding of the risks ahead and a new early warning signal to watch for.
theconversation.com
December 23, 2024 at 3:24 PM
Atlantic Ocean is headed for a tipping point − once melting glaciers shut down the Gulf Stream, we would see extreme climate change within decades, study shows https://buff.ly/4gseFPC 🌎
Reposted by Manfred Frischholz
"Fly me to the moon" - the Apollo Guidance Computer was basically build on this resistor-transistor NOR gate, each IC containing 3 or 6 transistors, forming either a single 3-input NOR chip, or a double 3-input NOR chip.
#RetroComputing #Apollo #AGC
#RetroComputing #Apollo #AGC
December 23, 2024 at 1:54 PM
"Fly me to the moon" - the Apollo Guidance Computer was basically build on this resistor-transistor NOR gate, each IC containing 3 or 6 transistors, forming either a single 3-input NOR chip, or a double 3-input NOR chip.
#RetroComputing #Apollo #AGC
#RetroComputing #Apollo #AGC
"PiA® - Physics in Advent" is a unique Advent calendar offering 24 fun physics experiments and puzzles.
Each day features a video showing an experiment you can try at home, with questions to answer online and solutions revealed the next day.
Discover the joy of physics!
youtu.be/azaUozj0XlY
Each day features a video showing an experiment you can try at home, with questions to answer online and solutions revealed the next day.
Discover the joy of physics!
youtu.be/azaUozj0XlY
PiA® - Physics in Advent 2024 - question 23
YouTube video by Physik im Advent
youtu.be
December 23, 2024 at 9:52 AM
"PiA® - Physics in Advent" is a unique Advent calendar offering 24 fun physics experiments and puzzles.
Each day features a video showing an experiment you can try at home, with questions to answer online and solutions revealed the next day.
Discover the joy of physics!
youtu.be/azaUozj0XlY
Each day features a video showing an experiment you can try at home, with questions to answer online and solutions revealed the next day.
Discover the joy of physics!
youtu.be/azaUozj0XlY