Yeah they are but it seems like most electrical instructors don’t know that they just think “water is close enough as an analogy to electricity but breaks with AC” when in fact they’re both identical. So they’ll tell you to forget the water model while teaching you AC. The inertia/pipe strain comparison is very rare to hear.
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iocase@lemmy.zipto
Privacy@lemmy.ml•Canada wants to join the age verification bandwagon and censor the internet with Bill C-34
1·12 hours agoMeta is funding massive non profit groups lobbying for it at the OS level in the name of child safety. If there’s going to be age verification anyways they don’t want to pay for it, and want to benefit from the better ad targeting.
iocase@lemmy.zipto
You Should Know@lemmy.world•If you are coming from Reddit: YSK that Lemmy and Piefed have no karma. Don't delete your posts.
12·23 hours ago“the internet is 5 giant websites filled with screenshots of the other 4”
iocase@lemmy.zipto
Technology@lemmy.world•Tesla on Autopilot Smashes Straight Through Garage Door, Driver SaysEnglish
2·1 day agoNon-Tesla cars have black boxes already and have for years so you yeah you’re right
I went through the same thing with electronics being taught the water model then you’re told to throw that out because AC doesn’t act like water.
I say bullshit! My instructors didn’t understand AC well enough IMO
Once you understand AC well enough you realize it still applies to the water model of electrical flow. Induction is inertia, capacitance is pipe deformation from pressure.
When you slam a valve shut in an old house you make a massive pressure spike (inductive field collapse, flyback voltage spike) which oscillates within a resonant circuit when the pipes absorb that extra pressure by expanding, then releasing that spike back into inertia, which makes a smaller spike back into hoop stress until friction (resistance) saps all of the energy out of the circuit.
You can make a DC-DC boost converter by opening and closing a valve really quickly on a long pipe and feed the pressure spikes into a check valve.
iocase@lemmy.zipto
World News@lemmy.world•Russian frigate fires warning shots at British yacht in Channel – reportsEnglish
41·1 day agoOr it’s for an internal Russian story to help keep the country from imploding since they have very little good news to spread around.
“Brave Russian frigate fires restrained warning shot on imperialist NATO yacht with evil intentions”
Or something
AFAIK ClamAV is mostly for looking for windows targeted malware so I doubt it
iocase@lemmy.zipto
Linux@lemmy.ml•The security situation with the Arch Linux AUR got a lot worse
1·1 day agoVagueposting clickbait? On the internet!? For views and clicks!?! The website is AIDS it’s so full of ads!?
iocase@lemmy.zipto
Technology@lemmy.world•Frances Haugen: ‘We are worse off today than when I leaked the Facebook documents’English
9·2 days agoShoot themselves in the back of the head twice and fall off a balcony
Welp
Looks like a suicide to me boss…
Big fucking agree!
These are all natural monopolies. Massive, incomprehensible unbelievable amounts of money need to be invested to make a network, and then running the next train, or adding a new gas or power customer is peanuts.
Any time suggesting “hey, maybe we should build an entirely separate system so we can compete” results in people bringing you in for a forced psych eval, you’re talking about a natural monopoly.
It’s illogical to duplicate the network so “pRiVaTe CoMpEtItIoN” now has to negotiate common carrier agreements and the admin overhead makes it twice (sometimes 10X) more expensive than just one crown corporation owning the entire fucking thing!
80% of all grocery sales go to one company
Regulated for by the government of Canada
And before people get angry assuming I’m against regulations I’m not, they’re just used as a weapon by Plutocrats to protect their own private kingdoms
In Canada we have:
2 grocery store parent companies
5 banks
2 railroads
2 telecos
1 power authority per province (in my province it’s a crown corp which is fantastic. Their shareholders are rate paying citizens not private shareholders)
3 shipping companies
What is it for car parent companies now? 3ish?
1 gas provider per province
All of our oil and gas companies are American except for 3
The only competition is among coffee shops and bistros, and even then the biggest chains are owned by 3 companies.
iocase@lemmy.zipto
Technology@lemmy.world•Iran warns SpaceX & Starlink will be considered 'military targets'English
4·4 days agoI’m prefacing this by saying my background is playing KSP and inadvertantly making my own Kessler syndrome when running out of fuel braking during a station rendezvous 😅
Yeah you’re fundamentally trading energy. It depends on how the impact happens but orbital scientists think in terms of the average velocity of a collision event and their likely angle. 30⁰ head on at 7km/s is roughly normal I think?
A head on collision means that you have the full kinetic energy of both satellites to work with. Some parts get thrown up into massive orbits even up into medium earth orbit. Others deorbit due to hitting at the right angle to lose enough kinetic energy that their orbit drops.
Overall your debris ends up in a plume heading in the direction of both satellites, shaped like a flat cone. In the case of starlink they might have to deorbit the entire constellation while they still have control over them since that cone is invariably going to shotgun blast one or more satellites on the next orbital string

iocase@lemmy.zipto
Technology@lemmy.world•Iran warns SpaceX & Starlink will be considered 'military targets'English
2·3 days agoThe only good news is any debris you generate has some part of its orbit extremely low due to starlink satellites being so low themselves. That’ll stop being true once debris finds something else to hit higher up but it’s easier to deorbit stuff this low since there’s really quite a bit of atmospheric drag at periapse.
Edit: I should clarify that even after a collision debris has to have an orbit that crosses through the altitude the impact happened at unless some more energy is added higher up in its new elliptical orbit
iocase@lemmy.zipto
Technology@lemmy.world•400+ Arch Linux AUR Packages Compromised in a Supply Chain Attack Deploying InfostealersEnglish
5·6 days agoThe attackers specifically targeted orphaned projects on AUR so it’s no wonder most of those aren’t familiar to us.
iocase@lemmy.zipto
Technology@lemmy.world•Microsoft doesn't know what to do about the memory pricing crisis Microsoft is causingEnglish
81·6 days agoYou can stop pulling the lever at any time. All that happens is modern society unravels as we enter the financial equivalent of a thermonuclear bomb going off. The same will happen but slightly worse if you keep holding the lever.
Let’s break it down:
❌ we fucked up
❌ We didn’t verify who we were sponsoring
✅ We’re really sorry 🥺😭
If your partner cheated on you and apologized with AI would knowing that fact be fruitless also?






9/11 was the first sacking of Rome
This is the second sacking?
Soon will we see Trump pleading for a foreign emperor to save him from having his powers stripped away…?