Recent comments in /f/explainlikeimfive
Gnonthgol t1_jacfga2 wrote
Reply to comment by Lined_the_Street in ELI5 How are there graffitis in unbelievable/dangerous spots? by [deleted]
I think you unterestimates the life threatening situations a kid with a spray might be willing to put themselves in to get the ultimate tag. There is an issue with kids breaking into train yards to tag the rail cars and hurting themselves as the cars gets pushed around or by electrocuting themselves on live wires. But most of the larger grafiti higher up on buildings and infrastructure is made by older people in their late 20s or early 30s.
NameUnavail t1_jacf5rk wrote
Reply to ELI5: What's hard about copying photosynthesis or just using plants for power by No_Dust_5360
There's already technology to create power from sunlight. It's called solar.
There's no point in trying to get a plant to do it
Lined_the_Street t1_jaceco9 wrote
Reply to comment by Gnonthgol in ELI5 How are there graffitis in unbelievable/dangerous spots? by [deleted]
Jeez I never thought about how serious a graffiti artist could get
I just mindlessly always pictured nothing more than a kid in a Hoodia with a spray can
ScienceIsSexy420 t1_jace919 wrote
Reply to ELI5: Why is it that if I want my shower to be warmer, if I turn the cold-water knob to the right (closer to off), the water in the shower gets significantly colder for about 30 seconds, then MUCH colder for about 5 seconds, then super hot? Why would closing the cold water make it colder? by [deleted]
The water in your water heater tank is far to hot to use, so instead it is blended with cold water at the tap. This increases the amount of hot water available to be used. So, when you turn the cold tap down, you are reducing the amount of cold water being mixed with the incoming hot water. This is why turning off your cold tap makes your water get hotter. As for why it takes so long, as another commenter pointed out, it takes time for the water that has been sitting stagnant in the pipes for a while to get used and for truly cold water to be running through your taps. The water that has been sitting in your pipes in your house is a good deal warmer than the fresh cold water coming from the underground main line.
[deleted] t1_jacds8w wrote
QueenofLeftovers t1_jacdfi9 wrote
I would also like to add while 365 days is a super accurate number to measure, 13 full moons (or 28-day months) wouldn't be a wild stretch for smallfolk woth no education to recognise a certain season has come around again with some reliability
PastelFlamingo150 t1_jacd7ua wrote
Reply to comment by Kaisermeister in ELI5: Why is it that when fertilizers make their way into waterways, all the oxygen disappears, killing the fish? by Psychological-Dog994
What about setting up at the mouth of the rivers? I imagine the operation would be easier if it was operating in New Orleans rather than Midway.
ratherbealurker t1_jacd5id wrote
Reply to comment by cshaiku in ELI5 - What are calls/puts in stock trading, and how are returns calculated when they are executed? by burman07
Not really although you can use them in so many different ways. Here’s how I’ve used them, it’s been years since I’ve traded options because I’m heavily restricted at work, but in the past I’ve used these simple strategies.
Also first keep in mind that you don’t have to exercise an option that’s in the money (meaning profitable) you can just sell it.
Many times I owned a stock and just wanted to play swings without buying and selling it so:
Buy a call: I own ACME and it’s at $10 so I think it’s going to go up. I buy a call option that expires in a month or so with a strike price of 10 or 10.25. Then if it goes up to 12 I sell that option. I didn’t really want the shares so i did not exercise the option, just sold it for the profit.
Buy a put. I own ACME and I though it was going to dip. So it’s $15 and I buy a put option at a strike price of $15 or $14.50. If it drops then I sell that put. I want to keep my shares so I don’t exercise.
Selling them is opposite. When I bought calls I was betting it was going to go up. So sometimes I’d think that ACME was going to go down so I wrote and sold a call option. It’s at $10 so I sell a call and it goes down, that person that bought that call option with a strike around $10 is now holding a worthless contract since it’s now at $8. Why exercise and buy from me when it’s cheaper on the market? I pocket the money from selling the contract and it expires worthless. And if it did go up, well I still made profit on my shares just not as much as I could have.
Sell a put, I think it’ll go up so like the call sell I write the contract and take the money and it expires worthless. Why sell to me when you can sell to the market same price?
Very simplified and it gets deeper than that. Look up option strategies, like straddles.
A_Meal_of_Pain t1_jacd30j wrote
Reply to comment by Shtercus in ELI5: Why do we push out weird noises when something is funny? by PeakKey4068
Also playing a part is the fact that it is often rude to fully express your emotions so we figure out ways to at least partially hide them.
If your boss does something stupid and you are in the back of the room, you probably don't want to laugh out loud and draw attention to yourself, but a little chuckle that the people around you can see might be an appropriate compromise that you instinctively settle on.
Hawkishhoncho t1_jacd1d3 wrote
If you just have a post, and mark how long it’s shadow is at noon every day(aka when it’s shortest each day) and you’re any distance at all from the equator, you’ll get a 365 day cycle of that length getting longer and shorter. Or you have a water clock made of a barrel with a leak, and time how long the days are, that’ll also give you that 365 day cycle, of days getting longer until they hit a maximum, then shorter until they hit a minimum, then longer until they hit that same maximum.
Big_carrot_69 OP t1_jacc4kh wrote
Reply to comment by TheJeeronian in Eli5: An adult human body weighing 70 kg contains about 0.2 milligrams of gold inside him. How did that gold got in the humans if no foods have gold and gold is not absorbed during digestion either? by Big_carrot_69
It looks like it. Apparently gold helps the joints and transmission of electrical signals in the body from a study I've read.
flareblitz91 t1_jacb8m8 wrote
Reply to comment by TheRealSmallBean in ELI5: Why is it that when fertilizers make their way into waterways, all the oxygen disappears, killing the fish? by Psychological-Dog994
Slightly less ELI5 expansion: Nitrogen and Phosphorous are both considered “limiting nutrients” basically every ecosystem on the planet is limited by one of these two nutrients, naturally speaking phosphorous only comes from the weathering of minerals and bio available nitrogen only comes from nitrogen fixings bacteria in anaerobic environments (such as nodes in some symbiotic plant roots) and lightning…until the invention of the Haber-Bosch process the amount of useable nitrogen on earth was functionally fixed….people were scraping guano off of rocks to make TNT…
Anyway, with industrial processes and fertilizers we’ve cranked these nutrients up to 11 to disastrous result on the environment, seriously this might be worse than climate change unless we stop what we’re doing (we won’t).
Nutrient pollution not only causes these aquatic issues, it can also heavily favor invasive species, as native plants are typically adapted well to a specific environment, which includes nutrient availability, invasive plants more suited to higher nutrients can take advantage of higher levels of available nitrogen and phosphorous, grow rapidly and displace the native plants.
This is actually one of the reasons why wetlands are so critically important, not only to they tend to collect the nutrient pollution and prevent it from being washed downstream, they are also a critical site for nutrient cycling, in this case specifically Denitrification.
CliffExcellent123 t1_jacasxk wrote
Reply to comment by bulksalty in eli5 What is the purpose of those little “I am not a robot” buttons. Can a robot seriously not detect and click them? by Lord-Zippy
>When it's not sure you get to identify something they need to train
their AI or mark on google maps, like vehicles traffic control devices,
fire hydrants, hills etc.
Which is why those tend to show up more when you're in Incognito mode or using a VPN.
A_Meal_of_Pain t1_jacas67 wrote
Reply to ELI5: Why is it that if I want my shower to be warmer, if I turn the cold-water knob to the right (closer to off), the water in the shower gets significantly colder for about 30 seconds, then MUCH colder for about 5 seconds, then super hot? Why would closing the cold water make it colder? by [deleted]
That causes it to switch over to the hot water pipes. But the water that you 1st get out of those pipes is not water that is in the water heater. It is water that has been sitting in the pipes and has gotten to the same temperature as the air around it. Depending on where you are and what time of year it is, that can end up being a lot colder than the "cold" water. Because the water we think of as the cold water is not actually cooled, but just kept in pipes largely underground.
Gstamsharp t1_jacan52 wrote
Reply to comment by spicymato in ELI5: why does/doesn’t probability increase when done multiple times? by Reason-Local
It's trivial because they're independent. Bayes theorem applies to dependent events. Dice rolling isn't dependent. You're talking in circles to justify using incorrect logic.
"The 1998 Superbowl championship isn't related to how many Doritos I ate yesterday, but if it was here's how I'd twist this logic diagram to explain it."
That's what you're doing here.
Thoughtfulprof t1_jaca0pe wrote
Reply to comment by bal00 in ELI5: What is a "naturally aspirated" engine? Is it always desirable? Are there "artificially aspirated" engines ? by Gaboik
Naturally aspirated engines also rely on the density of the atmosphere for their efficiency. At sea level, they produce full power, but as you go up in elevation they decrease power substantially. It's pretty much impossible to sustain combustion alive 12,000 feet without using a turbocharger or a supercharger. While that's not necessarily a major problem for cars, it's a huge problem for airplanes with reciprocating engines. There are lots of small aircraft with turbochargers as a result.
NameUnavail t1_jac9swt wrote
Reply to eli5 What is the purpose of those little “I am not a robot” buttons. Can a robot seriously not detect and click them? by Lord-Zippy
The reCaptcha service is owned by Google, and it feeds a whole bunch of data, exactly what Google won't tell us, into one big machine learning algorithm that spits out a score how likely it thinks you are a bot, and depending on what that score is the site then deals with your request.. Checking the box is mostly unnecessary, and the newest versions of captcha don't even have it anymore, they just run silently in the background without you even knowing.
UnitSignificant2866 t1_jac9rfz wrote
Reply to eli5 What is the purpose of those little “I am not a robot” buttons. Can a robot seriously not detect and click them? by Lord-Zippy
I was told that clicking the not a robot box gave permission for some of your recent browsing history to be released. I'm not sure what algorithms it uses but your history and any other data in the package is something a robot can't fake yet.
where-is-sam-today t1_jac9r9l wrote
Reply to comment by TheRealSmallBean in ELI5: Why is it that when fertilizers make their way into waterways, all the oxygen disappears, killing the fish? by Psychological-Dog994
Oh! And i can reverse the problem!
The process is called amelioration - it comprises of two stages - aeration, and bio manipulation.
Compressed Ozone is funnelled through tubes to the bottom of the lake / water body, and is released through stainless steel disks. It completes the oxidation process of the decay/ decomposition of organic matter all the way from the depth to the surface. Decayed matter starts to surface and is collected. Gradually the lake literally "vomits" out the crap. That's aeration.
All this while the water quality is measured, and once it reaches optimum level, specific species of fishes are introduced , and that's bio manipulation.
The lake shines again!🍀
DarkTheImmortal t1_jac9hqv wrote
Normal Iron has no carbon, steel is less-than 2% carbon, and cast iron is more than 2% carbon
TomChai t1_jac9g9s wrote
Reply to eli5 how fast charging works for phones. by Phoenix_3222
Fast charging is just an alternate way of delivering power through standard 5V USB lines.
Regular USB lines are rated at 5V. To allow transmitting higher power without ramping up the amperage, you add voltage instead.
This creates a problem that the same connector now comes in higher voltages, which older device may not be able to withstand and will just fry if clueless users plug them into the new charger.
So There is a series of protocols to authenticate between the charger and the receiving device before it switches to fast charging, without authentication, the charger only outputs at 5V.
For charging time, OP did not provide enough information, like the model of the phone, charging from what percentage to what percentage and the temperatures. Charging will become slower above 80 and even below 80 if the temperature is out of the safe range.
AffectionateCan99 t1_jac9awi wrote
Reply to comment by wpmason in eli5 What is the purpose of those little “I am not a robot” buttons. Can a robot seriously not detect and click them? by Lord-Zippy
Theres about a million other things they factor in. How fast did you click or touch for example
spencermiddleton t1_jac92e2 wrote
Reply to comment by GaiasEyes in Eli5: what’s the difference between a graduate and undergraduate degree by deadpuppy101
Also: Canada
Gnonthgol t1_jac8vo6 wrote
If you put grafiti somewhere which is hard to get to it is less likely for others to destroy the grafiti and therefore it is more likely to stay up for a long time. A lot of the grafiti is done at night when it is harder to get caught and also easier to do invasive things like blocking sidewalks or roads. A lot of the more serious grafiti artists will secure themselves to the best of their efforts with safety harnesses and spotters. They will use properly secured platforms to paint from. If you drive around at night you might confuse them for legitimate maintainance workers.
Less serious grafiti artists might not do all of these safety measures. But they will still bring the tools required for the job and usually a couple of friends. Accidents still happen but not as frequent as you might think.
ScienceIsSexy420 t1_jacfljd wrote
Reply to ELI5: What's hard about copying photosynthesis or just using plants for power by No_Dust_5360
I've been intrigued by this very question since I first learned about photosynthesis and the electron transport chain 20 years ago. Much work has been done trying to accomplish exactly what you're describing, but so far we have yet to successfully recreate photosynthesis. The major sticking point is that the compounds that we create to synthetically reproduce photosynthesis are not nearly as durable as the biologic molecules in a plant. We cannot directly use the same molecules that plants use because we are trying to accomplish something slightly different: plants use the electrons generated by photosynthesis to create sugar molecules, while humans are trying to harvest the electrons directly. Moving electrons is a chemical reaction called an oxidation-reduction reaction (called redox for short), and our redox molecules simply aren't as stable or efficient as their protein counterparts.