January 21, 2023
Mohenjo
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You Can Do It!
You don’t need to be well-versed in quantum physics or even complex math to solve Albert Einstein’s famous house riddle. All it takes to tackle the problem below is logic—and if that isn’t enough for you, you can find the answer at the end of the article.
According to Popular Mechanics, the riddle goes like this: There are five houses lined up next to each other along a street. Each house is a different color, and each homeowner is of a different nationality, drinks a different beverage, smokes a different brand of cigar, and owns a different pet.
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Albert Einstein photographed in 1905. / Ann Ronan Pictures/Print Collector/Hulton Archive/Getty Images
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January 20, 2023
Mohenjo
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Some call it fate. Others call it destiny. And some just brush it off as coincidence. But however you view it, life has a funny way of bringing people together at just the right place and time. Check out some of the most random historical encounters we could find—meetings that, had they not happened, would have resulted in a very different world today.
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Sacagawea acted as a guide for Lewis and Clark. / Edgar Samuel Paxson, Wikimedia//Public Domain
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January 19, 2023
Mohenjo
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New GUINNESS WORLD RECORD™ Title! The best of classical music, played by a train.
Take part in our three challenges:
1. How many songs are being played?
2. Which songs?
3. How many glasses were used in total?
A little hint: We used melodies from Wolfgang Amadeus Mozart, Giuseppe Verdi, Ludwig van Beethoven, Johann Strauß, Pyotr Illych Tchaikovsky, Johann Sebastian Bach, Antonio Vivaldi, Johannes Brahms, Georges Bizet, and many more.
These greatest classical music pieces are famous all over the world. So lay back, relax and enjoy this crazy video with one of the most special classical music compilations.
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Classical Music Medleys played by a Train
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January 19, 2023
Mohenjo
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In late 2022, Jessica found herself in a predicament that will sound familiar to many job seekers: slogging through an extended interview process with seemingly no end in sight.
She was up for a job as a fundraiser at a major social services organization in New York. Across the span of two months, she took part in six separate interviews with nine people total, multiple of whom she met more than once. She’d pulled one of her first all-nighters in years putting together a dummy presentation on a hypothetical corporate partnership for interview No. 4, which entailed what she describes as a 15-minute “monologue” from her on the matter followed by a 45-minute Q&A with a panel. It wasn’t until the final interview that she got a real one-on-one sit-down with the person who would be her boss.
“Every time I thought, ‘Okay, this is the final hump,’ there was another thing,” said Jessica, which is a pseudonym. Vox granted her anonymity in order to protect her privacy and keep her out of hot water with her current employer. “It just gets really mentally exhausting, and it’s hard to manage your work schedule because obviously, you don’t want your employer to know you’re interviewing.”
Job-seeking can be a real exercise in immersive futility. It often feels like you’re tossing your resume into the abyss and praying to the recruitment gods for a response. If and when you get that response, the landscape doesn’t always get easier. Companies are seemingly coming up with new, higher, and harder hoops to jump through at every turn. That translates to endless rounds of interviews, various arbitrary tests, and complex exercises and presentations that entail hours of work and prep. There can be good reasons for firms to do this — they really want to make sure they get the right person, and they’re trying to reduce biases — but it’s hard not to feel like it can just be too much.
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It should not take endless interviews to get a job. And yet.Getty Images/Vox
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January 19, 2023
Mohenjo
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“OXCART” WAS AN ODD NICKNAME for the plane that killed pilot, Walter Ray. Oxcarts are slow, cumbersome, and old. Ray’s A-12 jet, meanwhile, was fast, almost invisible, and novel. Among the US’s first attempts at stealth aircraft, it could travel as quickly as a rifle bullet, and fly at altitudes around 90,000 feet. On a radar screen, it appeared as barely a blip—all the better to spy on Soviets with—and had only one seat.
On January 5, 1967, that single space belonged to Ray, a quiet, clean-cut 33-year-old who spent his workdays inside Area 51, then the CIA’s advanced aviation research facility. Set atop the dried-up bed of Groom Lake in the Nevada desert, the now-infamous spot made for good runways, and was remote enough to keep prying eyes off covert Cold War projects. On the books, Ray was a civilian pilot for Lockheed Martin. In reality, and in secret, he reported to the CIA.
Ray’s last morning on Earth was chilled and windy, with clouds moving in and preparing to drop snow on the nearby mountains. He took off for his four-hour flight to Florida and back a minute ahead of schedule at 11:59 a.m., the sleek curves of the Oxcart’s titanium body triggering sonic shock waves (booms) as it sliced through the atmosphere. He’d done this many times, having already logged 358 hours in these crafts.
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Stealth A-12 jets were never meant to be seen, then one went missing in the Nevada desert. US Air Force
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January 18, 2023
Mohenjo
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January 18, 2023
Mohenjo
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It all started with a bang. During an unimaginably brief fraction of a second, the embryonic universe ballooned in size with unimaginable swiftness. In a flash, dimples of imperfection stretched into cosmic scars and locked in the universe we experience today, a milieu filled with galaxies, stars, planets, and humans.
The circumstantial evidence for this origin story, known as inflation, is overwhelming. It has inspired a generation of cosmologists to write papers, teach classes, and publish textbooks about the sundry ways inflation could have played out. And yet, a smoking gun remains elusive: Ancient ripples in spacetime should have left a particular imprint on the sky, but searches have repeatedly come up short.
A group of astronomers known as the BICEP/Keck collaboration leads the hunt for these “primordial gravitational waves.” In 2021 the researchers released their latest results, the culmination of years of painstaking labor in one of the harshest places on Earth. Once more, they found no sign of their quarry. If an inflating universe reverberated with gravitational waves—as most cosmologists still fully expect it did— it must have done so in a rather subtle way.
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Fingerprints of reverberations from the first moment could be hiding in the universe’s oldest light, but astronomers haven’t found them yet. ESA and the Planck Collaboration
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January 17, 2023
Mohenjo
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On a clear day, with the right weather conditions, a portion of the sky busy with commercial flights can become riddled with contrails, the wispy ice clouds that form as jet aircraft fly by.
They might look innocuous, but they’re not — contrails are surprisingly bad for the environment. A study that looked at aviation’s contribution to climate change between 2000 and 2018 concluded that contrails create 57% of the sector’s warming impact, significantly more than the CO2 emissions from burning fuel. They do so by trapping heat that would otherwise be released into space.
And yet, the problem may have an apparently straightforward solution. Contrails — short for condensation trails, which form when water vapor condenses into ice crystals around the small particles emitted by jet engines — require cold and humid atmospheric conditions and don’t always stay around for long. Researchers say that by targeting specific flights that have a high chance of producing contrails and varying their flight path ever so slightly, much of the damage could be prevented.
Adam Durant, a volcanologist and entrepreneur based in the UK, is aiming to do just that. “We could, in theory, solve this problem for aviation within one or two years,” he says.
Durant has long studied how atmospheric contaminants affect the health of aircraft engines, and after the 2010 eruption of an Icelandic volcano brought aviation to a standstill, he embarked on a project with Airbus and easyJet to research volcanic ash. In 2013 he founded his own company, Satavia, initially focusing on preserving engines from damaging pollutants like dust, ice, and volcanic ash. “Then, Covid shifted the priorities of the whole industry towards sustainability,” he says.
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January 17, 2023
Mohenjo
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Heaven knows what seeming nonsense may not tomorrow be demonstrated truth.”
This is how the great mathematician and philosopher Alfred North Whitehead expressed his frustration with the onslaught of weirdness coming from the emerging quantum physics. He wrote this in 1925, just as things were getting truly strange. At the time, light had been shown to be both particle and wave, and Niels Bohr had introduced a strange model of the atom that showed how electrons were stuck in their orbits. They could only jump from one orbit to another by either emitting photons to go to a lower orbit or absorbing them to go to a higher orbit. Photons, for their part, were particles of light that Einstein conjectured to exist in 1905. Electrons and light danced to a very unique tune.
When Whitehead spoke, the wave-particle duality of light had just been extended to matter. In trying to understand Bohr’s atom, Louis De Broglie proposed in 1924 that electrons were also both wave and particle and that they fit in their atomic orbits like standing waves — the kind you get by vibrating a string with one end fixed. Everything waves, then, although the waviness of objects quickly becomes less apparent with increasing size. For electrons this waviness is crucial. It is much less important to, say, a baseball.
Quantum liberation
Two fundamental aspects of quantum theory arise from this discussion, and they are radically different from traditional classical reasoning.
First, images we build in our minds when we try to picture light or particles of matter are not appropriate. Language itself struggles to address quantum reality since it is limited to verbalizations of those mental images. As the great German physicist Werner Heisenberg wrote, “We wish to speak in some way about the structure of atoms and not only about the ‘facts’… But we cannot speak about the atoms in ordinary language.”
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Credit: Mopic / Adobe Stock
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January 16, 2023
Mohenjo
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The latest political cartoons
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Provided by Tribune Content Agency Editorial
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