One of my all-time favourite facts is that solar eclipses are actually a very rare thing to happen in space. There is no reason why but our moon just happens to be the right size/distance to have this happen.
I’ve never seen one in person, but the next one is on the 8th of April crossing Mexico and the US. If you have the chance and are able, go check it out, if only to gloat on an internet stranger longing for his first total eclipse.
One passed over my area while I was at university, and the professor whose class we were meant to be in just said the day beforehand that he wasn't even going to bother scheduling anything for the first hour because he didn't expect anyone to be in. There's a famous hill-top cemetery in the city, and sure enough I saw basically all of my classmates there too
And keep in mind that the difference between a total eclipse and a partial eclipse is massive. It’s worth it to find a spot that is in the line of totality.
I got to see one about 7 years ago. Made a whole vacation of it, and was not disappointed. In the darkness, all the birds stopped singing. And to top it off, at the motel I stayed there was a cleaning lady yelling at me to get back into my room because this was a sign from her god saying this was the end of days.
This is incorrect. The moon is moving away from the earth and will stop. At some point in the future the tidal forces will balance out and the earth-luna system will be tidally locked. From that point on they will remain locked in orbit neither moving away or towards one another unless some other large gravitational force perturbs them (e.g. an extra solar planet wandering through the solar system and passing by earth-luna).
Fuck yes, enjoy bud. I’ve read people not using high enough rated welding goggles and getting eye damage though. I’d stay on the safe side and get appropriate solar eclipse glasses. You’ll be looking directly at the sun for several minutes after all.
I hate those bug trackers and forums. Like you have a problem that is quite difficult to explain. Then, after some time you finally stumbled upon a thread where someone else has the exact same issue… but there is NO solution and the thread was locked due to inactivty.
I recall reading an article about version numbers, and it mentioned an interesting example of some app where the version number is essentially pi. Each update just adds another digit to the version, so eventually it’s going to get really long. When the developer dies, all the remaining bugs in the software will officially become undocumented features.
Somewhat related, back in highschool I was really enjoying chemistry class. Super fun stuff, definitely a career path. Then when we were doing the math practices, I got a question wrong that I knew I combined correctly.
I asked the teacher and she said "oh yeah that one just doesn't follow the rules" instantly killed my enjoyment of chemistry.
Aw that's too bad. That response I'm sure you're paraphrasing, but "that one doesn't follow the rules" is the best part of science.
It means our rules aren't good enough, or we don't understand that one well enough. Figuring it out can be an entire career of discovery. And the reasons why can be fascinating and inspiring to more discoveries!
In this case, it was probably the teacher not being knowledgeable enough to explain a more advance theory that goes beyond the simple model he was teaching. What's sad is that the teacher didn't take the opportunity to dig deeper with the student, it could have been very motivating for the student to feel like he found something that went beyond the normal curriculum.
High school chemistry felt less like imperfect modeling and more like alchemy that sometimes yields tangible results. I can't remember specifics anymore but there were many moments where I was like "you're using too many shortcuts and this doesn't make any damn sense mathematically or dimensionally anymore". I know real chemistry is too complex to fit a high school program, but the way it was taught really was like a soft science cosplaying as a hard science.
Also chemists would use any pressure units before they used Pa. mmHg as a unit suffers from congenital defects I can only assume stem from repeated inbreeding.
At school, I thought our understanding of chemistry was really good. Years later, I realized that complicated solutions aren’t covered by any of the equations we have. You’re can do fancy calculations, but you’re always stuck with simple solutions and standard conditions. In real life, you have to deal with super messy non-standard stuff all the time.
Top scientists end up developing semi-empirical models, or even particle simulations, and that’s the best we can do right now. Nobody fully trusts those predictions, so we’re still going to need lab experiments before making any big decisions.
The good news is that there’s still so much to discover.
You aren't following the rules! You're supposed to nonchalantly get the correct answer and thus discover a new rule that we nowadays know as the Galapagon Principle.
The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his Catalogue des Nébuleuses et des Amas d’Étoiles (Catalogue of Nebulae and Star Clusters). Because Messier was only interested in finding comets, he created a list of those non-comet objects that frustrated his hunt for them. The compilation of this list, in collaboration with his assistant Pierre Méchain, is known as the Messier catalogue. This catalogue of objects is one of the most famous lists of astronomical objects, and many Messier objects are still referenced by their Messier numbers. The catalogue includes most of the astronomical deep-sky objects that can easily be observed from Earth’s Northern Hemisphere; many Messier objects are popular targets for amateur astronomers.
Not only. I live in Norway, where pedestrians have right of way and drivers are extremely careful. Discounting the risk from cars, there's still more personal danger to users of scooters as opposed to cars. If you have an accident on a scooter, you'll get scrapes, bruises, broken bones. As compared to a car, where unless you've really screwed up, you're unlikely to take any injuries at all.
Microplastics from heavy vehicles scrubbing away their tires is a bigger issue than tailpipe emissions, which is why tailpipe emissions are the only thing focused on with regards to regulatory standards. Can’t have people thinking BEVs are similar/worse for the environment than a small car.
They are more dangerous exactly because of the existence of cars. Cars are a small fortress that makes others less safe while keeping its contents safer. Unless they hit another fortress.
That only makes sense if you cycle among cars, but that makes cars dangerous, not bikes. If you remove cars out of equation by cycling on pavement or cycle route, the danger is gone.
Pedestrians get hit by cars all the time yet walking is rated the safest.
Pedestrians don't get hit by cars quite as much as cyclist, proportionally to their number, because cyclists are right in the street sharing the space with cars, trucks and buses. Cycling on the sidewalk is not allowed, and cycling lanes are often very dangerous. I understand that this chart is talking about danger to the passengers, not to others.
Hit a pothole going 25mph in your car. Hit the same pothole going 25mph on your scooter. I'll come visit you in the hospital after the scooter one and we can talk about how cars are obviously safer.
I ride an electric scooter, all it takes is one crack in the road that I'm less than prepared for and I'm going down hard.
That is a good point, mine is the second variety, electric one similar to the ones you see littering any major Urban area waiting to be rented. Although even the largest scooter is still far less safe over a pothole or around a rainy curve than a car, typical accident in the car you mess up the car and get a bruise from the airbag, but a typical scooter accident can be a lot more gnarly.
I think most people in the USA refer to the third item as a moped, which only gives you two categories for scooter. Scooter and electric scooter, and then moped and electric moped.
The roads are shit here. So badly cracked that I vibrate violently when I try to ride my scooter over them at like 10km/h. And that's while dodging potholes.
Heeeeell no. I had I minor fall on a scooter last week. I slipped at medium speed because of an uneven wet floor. I'm still fucked up and can't walk properly
Tell you what, you drive your bike into a car and maybe the concussion will change your thinking enough to make it believable that bikes are more dangerous.
We're not rating danger for the damn planet here. It's obviously danger for the user - that's the one who's buying the product. Why would anyone care about the safety of others over their own safety?
I will literally shit inside any human being I don't personally know (and some that I do know) if it makes my life 0.02% more comfortable. What's your point?
The tone and content of this message indicate a severe lack of empathy and a high degree of self-centeredness, verging on sociopathic tendencieslulz, you know how to underscore a perspective right there! I wonder if that is a brand new sentence…
No need to indulge but since you got me thinking about self interest and empathy:
If you had the opportunity to gain an extra hour of sleep the next time you wanted it, but in return, someone you don't know would experience moderate discomfort for ten years. Would you be willing to make that trade-off?
We're talking about me now? No. Of course not. Just like I wouldn't knowingly buy a car whose making process involves some random people being shit inside of. I find hyperbolic exaggerations funny and I like to use them for making a point.
The point was - you don't purchase things for others, you purchase them for yourself. A car can be a major money spender - you buy it because it gives YOU safety, and it's silly to act like you're a bad person for spending your money in a way that benefits you. But some Knights of the Broken Tire are out here pretending like they're damn selfless, like they spent all their house money on housing the homeless not their own family, and like they chose to carry that 2 year old through traffic on a bycicle, not a fucking minivan. Fuck right off with this hypocritical shit. It's okay to want the safety of yourself and your family, that's how the entire world works. You're not gonna get blamed for buying a car, drop the selfless, holier-than-thou act, nobody's buying it.
I’d not heard of this before, but this explains a lot of why my call center jobs were such BS.
We were expected to resolve networking, MS Exchange and VoIP issues in 20 minutes or less on average, which just resulted in a lot more customers having to call back because all the agents had to try and rush to a solution without time to test.
We don’t test for false convictions, which are as good as true ones for furthering careers in prosecution and law enforcement.
We don’t know if our prison population is 10% innocent or 75% despite Blackstone’s ratio.
In fact, when someone isn’t successfully convicted, it’s assumed the suspect got off on a technicality rather than continuing the investigation to find other suspects.
It’s wildly under-taught. It explains like half of all problems in the world. Education: “teaching to the test.” Economics: optimizing GDP at the expense of non-material well-being. Maximizing shareholder value by selling out employees and enshittifying your product. Software: “data-driven decision making” optimizing short -term gains over long-term because they are more measurable. That’s just off the top of my head.
The corporate bureaucracy is as much a product of the overall system, and just as much a slave to its incentives, as you or I. Though granted, the level of self-awareness of their role in the system is on average pretty low. With few exceptions, there is nobody at the wheel of problems like these. Worrying about whose fault it is is usually a waste of time.
It’s called a barycenter, kids, a common center that both objects circle around. That common center happens to be inside the sun, but that’s a topic for next week’s class in this semester’s AP Astrophysics program.
I don’t think the barycentre is inside the sun? Wikipedia says on the barycentre article:
When the less massive object is far away, the barycenter can be located outside the more massive object. This is the case for Jupiter and the Sun; despite the Sun being a thousandfold more massive than Jupiter, their barycenter is slightly outside the Sun due to the relatively large distance between them.[2]
As an Aussie, I don’t see why that is unusual. You use your feet. But if it’s only two icecreams, then you hold them both in one hand and swim with the other one. All I can say about this one though is that this is a very flat beach: Waves would ruin the icecream pretty bloody fast.
Swimming with something that can’t get wet is not unheard of here. I sometimes swim a book over to somewhere to read, or a phone to a good place for a photo too.
See, that IS completely unheard of here! If it’s not supposed to be wet, we wouldn’t dream of swimming with it!
I don’t know if it’s because you guys are born excellent swimmers like Norwegians are with skiing, but I don’t know ANYONE who wouldn’t assume that swimming with something invariably means getting it wet 😄
My wife being bemused I don't understand french in Paris after learning french for 3 years. Dude, they speak such sloppy french I'm impressed they understand each other.
Agreed...I was especially impressed after I learned about their Verlan. As far as I can tell it's basically pig Latin that they take seriously and use regularly as slang? As a quick example, the word Verlan is Verlan for l'envers. They can keep their secrets I guess haha.
I think Verlan is pretty neat. We had a full lesson on it in middle school because of one of our country's most popular musicians, Stromae, which is Verlan for Maestro.
Fantastic! Stromae is actually the reason I learned verlan existed! I got to see him live in the US, and it was one of the coolest live shows I've ever seen. The majority of the video for quand c'est is an actual part of the live show, and I wasn't expecting it at all
Wait, Verlan is l'envers, stromae is maestro... Is this Verlan thing just like Rioplatense Spanish's Vesre? (Vesre basically means revés i.e. inverse)
EDIT: Just looked it up on Wikipedia and it turns out this phenomenon happens in a number of languages: Riocontra in Italian (riocontra -> contrario), Podaná in Greek, Šatrovački in Serbia, Totoiana in Romanian.
This was one of my biggest issues with math myself. Sin, cos, tan, and logarithms still confuse me. Meanwhile, derivatives (a calculus concept) are pretty straightforward conceptually with the physics examples of distance, speed, and acceleration.
Derivatives are the change in something. So if you have a graph of something’s distance over time, the derivative is a graph of the change in distance at any given moment, or the speed of the object. Likewise, the derivative of the object’s speed is a graph of the object’s acceleration, or the change in the object’s speed at any given moment.
Anyway, this is also something that I used to rant about with my programming courses in college. You need an understanding of both the concept and the execution of it in order to program with a consistent amount of success, but most courses (and learning material) focus on one or the other.
I do systems admin/engineering, and I’m the team code monkey, but my co-workers want to learn. It’s still the core hurdle I see my them make when they try to script. They either have the concept down with no clue how to script it, or they’re flailing script snippets around without actually understanding what those parts actually do.
Logarithms confuse me too, even though I “invented” logarithms one day when I was bored before ever being taught about them. I know they’re exponents in reverse, and I know they can be useful to diminish the relative weight of larger numbers, but whenever I see logs in an equation, my degree of “I can figure out what this equation does” takes a significant hit.
Whenever dealing with exponential stuff i try to just focus on the formula of what is happening in the exponent. logarithms are taking that down to “normal space”. E.g. exponential functions are like in a warp drive, but you still have ships that can warp faster than others.
I wished they had taught us more context and concept in college EE classes. I guess super smart people figure that out on their own. It took me until several years after college before things started to click a little. I’m still working on it.
Electromagnetics still seems like dark magic to me though. I hated that class because it seems like it should have been the coolest topic ever but nothing made any sense.
Maybe they need to get dumber people teaching this stuff because at some point if you are too smart you take for granted leaps that elude some of us.
I have done teaching in a Corp setting for several years, and I find that all the questions from and confusion of students really push me to explain better, understand deeper, question some of the concepts, etc. (We teach both concept and execution)
I guess either our classes needed to ask more questions or the profs needed to work on their teaching or something.
Electromagnetics are dark magic and there is no way to teach it in any simpler terms that make it plausible without dark magic.
Even if you get all the concepts down. If you start asking “why”. The only real answer is, because in 73 BC an egyptian, a roman and a greek magician met in a basement in Kathargo to perform the most heinous ritual. But since the roman guy had a lisp in saying his incantation, instead of unleashing the demons of hell onto earth, electromagnetics becamse what they are.
I had to do a semester of learning how to deal with Fourier Transforms, with vague mentions of sine waves and slopes, before seeing Technology Connections’ video on CDs and finally understanding what all that math was actually for.
You should pick up some civil engineering books. I did 1 year before I realized I hated it, but they’re full of lovely equation that are like [Size of sand grains] x [percentage of empty space filled with water] x ([speed of water flow] + 14) x [Bill Factor]
(We add 14 to prevent the formula from breaking down)
(The Bill Factor was created by Bill Johnson and is 3.11 when it’s raining and 1.70 when it’s not. It is based on practical observations and has no theoretical basis)
There is also the whole formula set that adequately describes the phenomenon. It is a three dimensional set of differential equations, where you can only ever know five out of six starting conditions, so you need to iteratively adjust the sixth one until your error term is small enough. The formula set was developed 80 years after Johnsons proposal, using the advancements in computing technology, but the results are not better than what we get with the Bill Factor
So we thank Bill Johnson every day we use his Factor.
xkcd
Top