Thorry84
@Thorry84@feddit.nl
- Comment on *hiss* 3 days ago:
Over 25 years later and I still think of animal crackers when I hear that song
- Comment on What's up with all the moth memes? 3 days ago:
Return to beans!
- Comment on "There can be.... 6 days ago:
To the people who understand this meme: I hope your back is a bit better today, take care not to stoop down too much.
- Comment on If you were to launch a rocketship parallel to the earth, on wheels, how big would the ramp have to be to get it into space? 6 days ago:
Yes
As long as the object doesn’t reach escape velocity, it’s in orbit and thus bound by the primary object. Now this orbit can by very weird and huge, but it’s still a loop. Only above escape velocity does the loop “break” and leaving the object without a guaranteed return is possible.
So in theory if an object is in orbit and the boost is sufficient, it can just leave. However even then it is subject to the gravity fields and will make an arc instead of just a straight line. So “point and shoot” is never really an option. But often in movies a small spacecraft is seen making a small maneuver and somehow being seen as lost to space. That will for certain not be the case, a small boost just gives you a different orbit, but an orbit still.
For example the movie Life (2017) comes to mind. Spoiler alert. In the end they decide to use an escape pod to launch into “deep space” with the alien. The escape pod just points up and fires the rocket for a short while and now is lost to deep space forever. This is total nonsense. The reason escape pods can work with very little fuel is they often have just enough oompf (or delta-V if you want to be technical) to put the pod into a slightly lower orbit. This lower orbit means more drag from the atmosphere which slows it down further, lowering the orbit again etc. until the thing is slowed enough it can totally re-enter and land. It isn’t like an escape pod pointed down goes to Earth and pointed up goes into outer space. The pod actually fires in the direction of the orbit, so horizontally, in order to slow it down.
Orbital mechanics get really weird really fast. For example slowing down can cause the orbit to become higher before it goes lower. And putting in energy sideways can alter the angle of the orbit just like those spinning flywheel desk toys. Playing around with orbits in Kerbal Space Program can give a better understanding and can even make the concept of delta-V very easy to understand. KSP players would be unable to watch the movie Gravity (2013) for example without screaming at the screen: “THIS IS NOT HOW ANY OF THIS WORKS”.
It’s hard to figure out, that’s why we refer to hard things as “rocket science”. It’s not just the complexity of the rocket as a machine and engineering challenge. But also figuring out stuff like orbits, taking into account the different gravity fields of objects that are of note. Doing things like gravity assists or Hohmann transfer orbit, taking into account the influence the extremely thin atmosphere has. And remembering everything moves, so shoot for where the target is going to be, not where it is now.
- Comment on If you were to launch a rocketship parallel to the earth, on wheels, how big would the ramp have to be to get it into space? 6 days ago:
You are very welcome! <3
- Comment on If you were to launch a rocketship parallel to the earth, on wheels, how big would the ramp have to be to get it into space? 6 days ago:
There is a few different concepts here in conflict, which is why the question is hard to answer.
What do we mean when we say space? Usually we mean above the Kármán line, or above 100km. At that point you are above almost all of the atmosphere, so we consider that space. The atmosphere does actually extend quite a bit above that, but at that point it’s so thin we consider it to be space.
However as we know, the Earth has a bunch of gravity from its mass. So when you get up to 100km you just fall back down. Space isn’t free of gravity, the gravity of the Earth extends basically for ever. It’s influence does get less (thanks to Newton we know by how much), but considering the Earth is thousands of km wide when we get up to 100km we are basically still on the ground as far as gravity is concerned.
So why do we see astronauts fly around? They are weightless, so there is no gravity right? This is something popular media gets wrong a whole bunch, it’s not like there is some magically line called space and beyond there you are weightless. Those astronauts are actually in orbit, that’s why they don’t experience gravity from the Earth. To understand orbits, imagine we fire a big ass cannon. The ball flies through the air in an arc and lands on the ground. How far away it lands, depends on how fast we shot the ball. The faster it went out of the cannon, the further it flies. Now imagine we shoot the ball over the horizon, so it lands so far away we can’t even see it anymore. It still lands right? Yes, but only up to a point. It turns out if you shoot the ball fast enough, the arc just continues falling beyond the horizon until it loops around the Earth. As it is falling, it doesn’t experience gravity except for the arc it follows.
Usually when we put stuff into space, we mean put it in orbit and especially something called Low Earth Orbit . That means it needs to have a speed just like the cannon ball, to keep falling indefinitely. The speed we need is depended on how large the arc we want to have, or in other words how high the orbit is above the Earth. For context, if we want to fly in orbit in space so at an altitude of 100km, we would need to go almost 28254 km/h. Imagine driving that fast on the highway, it’s crazy fast.
That’s why we use rockets, it’s not as much about going up, it’s more about going really fast. So a rocket takes off and goes vertical for the first bit, this is to get to a thinner part of the atmosphere to reduce drag. Then it does something called the pitch over maneuver, usually in the form of a gravity turn. This is to go mostly horizontal and get that speed up. At the speeds rockets are going, they get to the 100km altitude in no time. So they pitch over as to not overshoot and use all their energy to go as fast as they can horizontally and thus into orbit. Then you get into the realm of orbital mechanics, which popular media also gets wrong a whole bunch. You can’t just point you spacecraft into space, give it a boost and be flying off into the void forever. If you want to learn more I would recommend playing Kerbal Space Program, to get a feel for how orbits work.
But say we are totally done with Earth and just want to leave it all behind, go into Deep Space. How would we do that? For that we need even more speed, something called escape velocity. If we get to that speed (40270 km/h), we can leave the Earth and go wherever we want, right? No not just yet, we might have left Earth behind, but we are still in orbit around the Sun. So we are still following orbital mechanics, only the Sun is the primary body we have to account for instead of the Earth. So we can use orbital mechanics to fly around the solar system.
If we want to leave the solar system, we would need to go even faster. But the issue is there is nothing out there. To get anywhere interesting, we would need to travel close to the speed of light for years. Even our fastest spacecraft are standing still compared to the speed of light, so leaving the solar system isn’t very useful right now. But we do have the Voyager space probes which kinda sorta left the solar system and we got some interesting data from them, which is cool!
- Comment on Button fly's 1 week ago:
I have both kinds and I don’t really care really. I just buy the pants because I like how they look, don’t even check what kind of fly they have. I have the ones with a regular zipper and 1 button, zipper with 2 buttons, no zipper just buttons, a little hook thingy button and fly combination. There are more important aspects of pants for me, like the fit, feeling, price and how they look.
- Comment on Celebrate my cake day 1 week ago:
1337 comments? You gotta pump those numbers up, those are rookie numbers!
I’m on 2213 right now, also joined around 2 years ago. So I would suggest it is in fact me who is carrying this network. Just kidding, we all know it’s Stamets@lemmy.world and by a lot.
- Comment on Okay Hans. We're safe 1 week ago:
ZEG MAKKER!
- Comment on Instead of asking all my stupid questions separately, could I just get a ton of "How to Adult" type resources in the comments? 2 weeks ago:
My personal advice: Take notes.
Just write everything down. I recommend an actual physical little paper notebook and a pencil. If you think: “Oh I must remember that” or “I’m almost out of …, I must buy more”
Now don’t go writing down stuff like fun facts or YouTube videos you want to watch. Make it all practical stuff, stuff you need to do or is important in your life. It’s your brothers birthday next week, write down the date and what you need to do to prepare. Your stomach hurt and you think you ate something that didn’t agree with you, keep a log of what you ate and how your stomach felt. That way you can identify allergies or things you can’t eat (anymore). Having trouble remembering names? Write down after you met someone: “Today I met Steve, Steve is in charge of accounting at Megacorp.” Measured the room you want to put new flooring in? Make a little sketch and put the measurements in.
Writing stuff down physically forces your mind to pay attention and remember it later in a structured way. It also feels really good to physically tick off a task or cross it off. It can be a bit hard to keep up with and not go the other way and put so much into it, it doesn’t help anymore. But it can help a lot, especially if you are the kind of person that thinks 8 times a day to put out the garbage, only to wake up the next morning and you’ve forgotten to actually do the thing.
- Comment on Why do websites now prefer IP-based geolocation rather than the `Accept-Language` HTTP header? 2 weeks ago:
I so hate the bad translations. Please just give me the app in whatever native language it was built in. And if I can’t understand that language, let me switch to English. It’s awful to use an app and have to translate everything yourself back to the native language to figure out what they actually meant and what went wrong in the translation.
And it’s especially annoying when errors and such are also translated. These often make even less sense and when trying to search the internet, it really helps if the error is in the language of largest user base.
- Comment on I can't keep up with the brain rot 2 weeks ago:
I think most young people are programmed to respond to “Hawk Tuah” by shouting “Rug Pull!”
- Comment on I Tried To Make Something In America (The Smarter Scrubber Experiment) - Smarter Every Day 308 2 weeks ago:
I’m not going to debate Intelligent Design in 2025, that’s just dumb.
The whole thing boils down to: Just because we don’t fully understand it, doesn’t mean it’s proof of god.
- Comment on I Tried To Make Something In America (The Smarter Scrubber Experiment) - Smarter Every Day 308 2 weeks ago:
Well, I don’t think it’s worth repeating the debate again. You can go back and look at what was posted back when it came out.
But he tells a very one sided story and keeps telling to keep an open mind. He presents this thing as if it’s totally unique and amazing, where there are very similar structures in nature out there. He also heavily focuses on the idea of it being a motor in the way that a human designed motor works, giving the same names to parts which are kind of similar on a surface level but really aren’t. He also repeats all of the bible thumper talking points around this subject, as if it’s a mystery nobody can explain and couldn’t have come to be without some kind of intelligent design at the helm. But the reality is, this is not representing the reality at all. This whole flagella thing was an exercise of goal post moving in the first place. The ID people kept pointing out weird things and missing links. Then when science explained exactly how that thing came to be, without ID involved, they just pointed to the next thing at one point ending up at flagella.
There is a whole Wikipedia page talking about how flagella evolved and how it came to be. The intelligent design people have been shouting about this for 3 decades now and there is so much info out there to find about how this came to be. If Destin wanted to approach this from a scientific standpoint, he would focus on that information, instead of presenting it like some kind of mystery we are still figuring it out today. And not keep telling people to have an open mind and how he can’t figure it out. He could have even gone into why people might think it was ID and then explain the science why it is not. Something other online science communicators often do, give people the points they have been hearing from the “wrong” side and then go into those points and explain them.
Basically the whole subject itself is very hard to present without going into the whole ID versus evolution standpoint and the way he represented it was straight out of the ID playbook. And keep in mind all of this was thoroughly debunked back 20 years ago. Him bringing this up now is inexcusable.
- Comment on I Tried To Make Something In America (The Smarter Scrubber Experiment) - Smarter Every Day 308 2 weeks ago:
I’ve responded with a link in another reply in this thread.
- Comment on I Tried To Make Something In America (The Smarter Scrubber Experiment) - Smarter Every Day 308 2 weeks ago:
He can believe what he wants in his personal time. He can even use his platform to spread his beliefs. However being all about science and then pushing some weird agenda is a whole other thing. He betrayed the trust, so I choose not to watch his stuff anymore.
It was this video: youtu.be/VPSm9gJkPxU
When this video went up it caused quite a fuss online as Destin seems to heavily push an old debunked intelligent design narrative around flagella.
- Comment on I Tried To Make Something In America (The Smarter Scrubber Experiment) - Smarter Every Day 308 2 weeks ago:
I haven’t forgotten Destin trying to push his creationist agenda using his YouTube platform. He makes a lot of good content, but after that I don’t want to watch his stuff anymore. Fuck him for doing something like that.
- Comment on Dakota Johnson Says ‘Madame Web’ “Wasn’t My Fault” & Blames Flop On Decisions Made By People “Who Don’t Have A Creative Bone In Their Body” 2 weeks ago:
Sure but an actor can choose not to do a movie when the script is terrible. Doing a movie and then blaming other people isn’t cool. You win together, you lose together. If the movie was a big hit, you can bet she would be taking credit.
It was obvious from start to end she didn’t know shit about what she was involved in. Probably thought the script sucked hard, but figured all super hero movie scripts are like that (which isn’t far off). She saw the money those kinds of movies are making and wanted in. She did the bare minimum and gave zero effort. Then when it flops she goes and blames other people, not a good look at all.
- Comment on Fried 3 weeks ago:
How are you going to play that guitar Egg? You’re a fucking egg. Did your inside get scrambled? You ain’t got no bloody arms man!
- Comment on Xbox 360/PS3/(to a lesser extent) Wii owners represent 3 weeks ago:
Are you referring to the red ring of death on the Xbox? Because that has absolutely nothing to do with ATI. They just made the chips, it’s Microsoft that put them on the board. Most of the issues were caused by a poor connection between the chip and the board, not a hell of a lot ATI could do about that.
A lot of it was engineers underestimating the effect of thermals between 80 and 95 degrees for very long times, with cool down cycles in between. The thinking was this was just fine and wouldn’t be an issue. It turned out it was an issue, so they learnt from that and later generations didn’t really have that issue.
- Comment on I won a key code for life of p does anyone want it? 4 weeks ago:
Cool, thanks for the effort!
- Comment on Viscous scoundrels 4 weeks ago:
I’ve heard being dummy thicc is a real tactical disadvantage!
- Comment on If it ain’t broke… 4 weeks ago:
I have to say this man aged like fine wine
- Comment on Why do bikes have a solenoid? 4 weeks ago:
Oooh you are talking about motorbikes. In my mind a bike is the manual peddle bicycle kind and I was wondering what kind of bicycle has a solenoid.
- Comment on Tech disabled and locked NTP to profit if RTC is wrong 4 weeks ago:
I agree, but with a security device this is probably not the best idea. Any kinds of tampering physically would most likely trigger the alarm, sometimes in a way that can only be fixed by calling a tech. Software tampering if you do get it connected would probably have the same result.
We’ve had this at work once, they were doing some remodeling and somebody accidentally hit a sensor with a large machine. The sensor was destroyed and the alarm went off (even though it wasn’t even “on” at the time, as it was in the middle of a day). No codes on the panel could turn off the alarm, not even our super duper override code. We called support, they gave us a temporary override code and even that one didn’t work. They said with physical tampering a tech must come by on location to tell the system all is OK. We had to work for 4 hours that day with the most annoying alarm sounds in the background. The worker that hit the sensor was very embarrassed about it.
- Comment on Sesame St is great 4 weeks ago:
In regional versions of Sesame Street Big Bird has an actual name (although usually it isn’t the exact same character, but another kind of large bird). I think mostly because in those languages it wouldn’t be an alliteration. But I like to think it’s just because Americans are rude and never bothered to learn their name, calling them Big Bird because of how they look.
- Comment on Anon isn't fooled by planes 5 weeks ago:
Well I must admit, when the plane is resting on the ground, the wings droop down a lot. Then when airborne it’s the other way around, the wings curve upwards as the fuselage hangs from them. In my mind nothing that big made of metal should be able to flex that much.
But since I’m not a conspiracy theorist, I have learned about material science, airplane design and engineering. And I have found out that it does indeed flex that much. It also isn’t that thick, since it’s only a skeleton wrapped with a very thin layer of metal. In fact if it didn’t flex as much, it would be weaker and not stronger.
So the thing I really learnt is never to trust intuition when it comes to things like this.
- Comment on Papal Optics 5 weeks ago:
Yeah I’ve used that one, the ash of war on it is great
- Comment on Speak American 5 weeks ago:
The whole concept of multilingual websites is foreign to Americans. There is only one language in their mind.
- Comment on Peculiar 5 weeks ago:
Use your pointy nipple antennae to transmit data back to Earth!