Recent comments in /f/explainlikeimfive
Worldsprayer t1_je6x51d wrote
Reply to eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
One of the larger issues is it is difficult to repair something made with ancient techniques in a way that does not make it blatantly obvious it has been modified.
For example it was only recently discovered that what was thought to be a case of poor quality control in Roman mortar was actually intentional and allowed structures to effectively "heal" when their concrete cracked.
As a result, you almost have to go back to ancient techniques to make a repair or improvement that looks the same, and its as simple as the fact that a hand-sawn board looks considerably different than a machine sawed piece of wood...which means in the end...its going to be really expensive.
smokeydabear94 t1_je6wrju wrote
Reply to comment by TheArmoredIdiot in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
They are both the bot and not the bot, until observed to be otherwise. Such is the nature of schrodingers bot
Hisei_nc17 t1_je6wr5b wrote
Reply to comment by Malikhi in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Wasn't she born because Zeus ate some lady he got pregnant, causing him a severe migraine and she just popped out from his head after Hephaestus lobotomized him to stop the migraine? Was there more to that story than the usual self fulfilling prophecy?
00zau t1_je6wmfz wrote
Reply to comment by luxmesa in ELI5 - Why are there so many ‘Question’ Scams for giftcards etc, How do these people make money? Same with quesstionare for money sites. by IndependenceCold4261
No, I think it was called something like 4loot. Totally sketchy.
taisui t1_je6wla5 wrote
Reply to comment by apple_cheese in eli5: How does GoodRX (or any prescription savings group) work? by fourtwenny2389
but governement wants money = tax = bad, even when the math works out to be cheaper.
Bernie rages.
Any-Growth8158 t1_je6wjtv wrote
A traditional (pre-tax) IRA means you put the money in an account before taxes are taken, and then this money is allowed to grow tax free as long as it remains in the account. When you start to pull money out the money is treated as ordinary income (it's as if you're making a salary equal to the amount you withdraw). This is best if you expect your tax burden to be lower in retirement than they are currently (generally you expect to have a lower income in retirement). What this means is that you really own about 70% or so of whatever your balance is in a traditional IRA, with the government owning 30% or so they'll collect in taxes when you start making withdrawals.
A Roth (after tax) IRA means you the money you are putting in the account has already been taxed. You've already paid taxes on the money you put in, and any increase in value will also be tax free when you withdrawal it. If you think you will make more money in retirement, or tax burdens will increase (considering the spending of the government this is probably a good bet) the the Roth IRA is for you.
These comments are all based on the assumption that the government doesn't change its mind sometime in the future, and thinks that it is unfair for you to have saved for your retirement when other people did not. Every so often (and likely to increase as the government becomes more cash strapped) you'll hear whispers of the government wanting to tap these accounts--applying means testing or some other things. I think they're safe in the mid-term future, but if things get really bad I wouldn't be surprised if the government does what governments do and steals your money.
The mentions above are about the basic rules, but there are a bunch of other ones around how and when you can withdrawals, and some income tests for individual IRAs.
TheArmoredIdiot t1_je6wipx wrote
Reply to comment by smokeydabear94 in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
It really, truly, could be both
luxmesa t1_je6wemh wrote
Reply to comment by 00zau in ELI5 - Why are there so many ‘Question’ Scams for giftcards etc, How do these people make money? Same with quesstionare for money sites. by IndependenceCold4261
> It was a knockoff search engine that ‘paid’ you a couple points to use it
Bing?
00zau t1_je6wde1 wrote
In real life, the scope doesn't line up perfectly. You "zero" a scope so that the bullet will hit on the crosshair at a certain distance, and at every other distance you adjust.
A real sniper will determine the range to the target, adjust for wind and other factors, and aim for a point some distance above and to the side of a target to account for the factors that will result in the bullet hitting away from the crosshair.
For example, you're shooting at a target 500m away. You know that at that distance your bullet will hit 3m below the target, and the wind will push the bullet .5m to the right in that time. So you aim 3m up and .5m to the left of where you want to the bullet to land.
Gullible-Annual-6085 t1_je6vw6c wrote
Reply to comment by EsmuPliks in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
I disagree. And sure that architecture is still in good condition but that was before the invention of HVAC and the temperature delta between the pressure systems is now much higher than it was during those periods. Besides stone and concrete is mostly an air barrier and is a much better air barrier than the typical buildings put up in 40’s-00’s with just substrate and fiberglass. Masonry buildings put up during this time are also in good shape.
We’re talking about the majority of malls/commercial buildings that have been left to rot.
I think it’s like 80 percent of commercial buildings have mold problems and water damage that were built during this period. I’d reckon the 20 percent are the masonry buildings.
smokeydabear94 t1_je6vmnk wrote
smokeydabear94 t1_je6vlvv wrote
Reply to comment by [deleted] in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Who's the bot? Is it you??
00zau t1_je6vjhs wrote
Reply to ELI5 - Why are there so many ‘Question’ Scams for giftcards etc, How do these people make money? Same with quesstionare for money sites. by IndependenceCold4261
They're getting your pageviews, clicks, and just generally interaction. If you aren't blocking ads, and they've got a 100 question quiz, with each question on a new page, they can get hundreds of ad views out of you clicking through the quiz.
Basically they make money the same way Google does... they just attract you with a fake service instead of actually providing something useful like Google.
I even used one of those types of things that did actually pay out a long time ago. It was a knockoff search engine that 'paid' you a couple points to use it, along with doing quizzes and the like, and after earning several thousand points over several months, I successfully "cashed out" a $5 or $10 gift card.
pigeonr0ck t1_je6vfcg wrote
Reply to comment by EkbyBjarnum in ELI5: How does your stomach "know" when to pass food on if more food keeps entering during initial digestion? by Water-Cookies
Humans are just a tube surrounded by meat with sphincters to keep things in place.
evanamd t1_je6vf62 wrote
Reply to comment by Any-Growth8158 in ELI5 - Why are there so many ‘Question’ Scams for giftcards etc, How do these people make money? Same with quesstionare for money sites. by IndependenceCold4261
You said how gift cards are worth money. You didn’t say how promising a victim a gift card in exchange for money leads to the scammer obtaining a gift card
dragowall t1_je6v5vk wrote
Reply to comment by Magneto88 in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Pretty sure that this claim is being contested right now as there is no official firman from the emperor in the ottoman archives. There is a good chance that Elgin just bribed officials there to take the marbles.
EsmuPliks t1_je6upes wrote
Reply to comment by Gullible-Annual-6085 in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
>To add, they were just designed poorly. These buildings were put up without an air barrier in the insulation envelope.
Meh, we also know now Romans used to mix lumps of calcium into their concrete to make cracks self repair, the "moisture" is by far not the issue. There are plenty of examples across Europe of 400 AD architecture still in good condition, the destroyed ones are usually either explicitly bombed to fuck in one of the hundreds of wars, or just uncared for and destroyed by accelerated erosion as modern infrastructure is built around them. And the occasional earthquake too, when talking about Italy and Greece.
tibsie t1_je6uew5 wrote
Reply to comment by apple_cheese in eli5: How does GoodRX (or any prescription savings group) work? by fourtwenny2389
Not just that... "If you want to sell your drug in our country you'll have to negotiate a decent price with us otherwise you can forget doing business here."
I'm so glad that I live in a country that gives me free prescriptions.
I find it very hard to get my head around the idea that a doctor has said that someone has a medical need for a drug, but they still need to find hundreds to pay for it out of pocket.
vettrock t1_je6tu9z wrote
Reply to comment by sethguy12 in ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
If it is true end to end encryption, NSA or anyone listening on the wire cannot read it unless they resort to brute force or some sort of vulnerability in the system. If they can get access to either endpoint they can read it there, or harvest the keys from there.
There were some recent congressional hearings where the FBI, etc wanted to make companies provide a back door into the system. Law enforcement may like it, but anyone who works in security will tell you it is a bad idea. In theory the backdoor key would be provided with a warrant, but there is not a good way of preventing bad guys from exploiting it. Additionally these companies operate globally. Do we want Facebook to provide a backdoor on the legally binding order of a Chinese or Russian court?
Any-Growth8158 t1_je6sqqy wrote
Reply to ELI5 Why do tidal waves or tsunamis in real life not look like the huge waves in the movies? by ColonyLeader
Tsunami's generally involve the whole water column as part of the wave. The normal waves you see are surface waves, and as the name inplies are only on top of the water column.
The wavelength of a tsunamis is MUCH greater than that of a surface wave. In open water the wavelength of the tsunami can be hundreds of km while a surface wave has a wavelength of a few 10's of meters.
Instead of stacking up, a tsunami "stacks long". It may be a short wave (height wise), but it keeps coming and coming and coming because it has such a long wavelength.
As everyone else says, a tall wall of water is much more photogenic/cinematic and scares people--probably because people have plenty of experience with surface wave with very few having experience with an actual tsunami.
homeboi808 t1_je6sjgs wrote
Reply to comment by scottreds2k in ELI5: What’s the difference between PRE TAX, ROTH BASIC, and AFTER TAX? by Wowerful
Just looked this up, it currently does but 2024 and beyond the RMD is gone for both IRA & 401k plans that are Roth.
This is good for those who have other sources for money like SS (or will just continue to work) and wish to let their 401k continue to grow as much as possible.
Didn’t really make sense for Roth accounts to have RMDs in the first place. For Traditional it makes sense as they don’t want you to just put it off and possibly die with paying the taxes for many years.
[deleted] t1_je6s0bw wrote
IndependenceCold4261 OP t1_je6qyti wrote
Reply to ELI5 - Why are there so many ‘Question’ Scams for giftcards etc, How do these people make money? Same with quesstionare for money sites. by IndependenceCold4261
you know those scams which say if you answer 10 questions you get 100 dollar delivaroo giftcards? their usually scam. how do the scammers make money
Pokinator t1_je6qy6l wrote
Reply to comment by sethguy12 in ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
The answer is extremely dependent on the platform.
Generally, once a message has been encrypted with a doesn't-suck-ass encryption algorithm, the only way to read the message is by having the key or breaking the encryption algorithm to get the key. (most in-use algorithms are pretty break-proof at the moment). Without the key, the message in transit is just gibberish.
When it comes to back doors, it's pretty hard to implement them without severely weakening security. Any point where you say "okay but at this part you can use our magical master key to read it" becomes a gaping hole in the integrity of your encryption.
More commonly, if the platform wants a back-door they'll do it on the client ends instead of in the middle. Create a way to hack into a user account and get their keys. Even that is a major security hole though.
If you want reliable security, there can't be a back door at all.
Adversement t1_je6xks9 wrote
Reply to comment by PippenDunksOnEwing in ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
Pretty much yes. For normal users, the modern almost ubiquitous end-to-end encryption just exists and works, and the two officially use pretty much identical key exchange.
Whatsapp even allows the user to check (offline, or IRL face-to-face, or say by sending the shown check data by a letter) that you and the other end of a given chat are actually an end-to-end encrypted pair (which would bust a third-party man in the middle impostoring as your friend for you and vice versa for your friend). Of course, Whatsapp is closed source app (but then again, did you build your Signal yourself from source on your device, and do you trust the source audits...).
So, probably depends on why you need it. Nice to have, especially as it should reduce Whatsapp to just use your metadata for marketing purposes (like to whom and when and how often) and not the actual message contents. Signal pf course doesn't do even that.