Recent comments in /f/explainlikeimfive
epic1107 t1_ja8zum5 wrote
Reply to comment by ace5762 in Eli5: why are some airplane jet engines under the wings and some on the vertical stabilizer? by Sad-Carrot-4397
You don't need to balance out the thrust in the event of an engine failure. You can fly with unequal configurations, it's just not efficient to do so by choice.
ShadowDV t1_ja8ztuo wrote
Reply to comment by chemist612 in ELI5: why does/doesn’t probability increase when done multiple times? by Reason-Local
Had to scroll way to far to get here.
hotel_alpha_lima t1_ja8zm97 wrote
Reply to ELI5: In simple terms what are Maxwell’s equations and how do they work and what do they mean? by whocaresfuckthisshit
Simply put Maxwell's equations describe how electric and magnetic fields change with respect to electric charges and their motion. Interestingly an electric field which changes in time generates a magnetic field and vice versa. This is why you will see that some of the equations reference each other.
Spank86 t1_ja8zl5m wrote
Reply to comment by ace5762 in Eli5: why are some airplane jet engines under the wings and some on the vertical stabilizer? by Sad-Carrot-4397
Exactly. The aircraft could continue with just the tail engine. In a 2 engine aircraft however you've run out of engines, unless you want to try to crab your way to landing (hence staying close to an airport)
cmlobue t1_ja8zksm wrote
Reply to comment by Lunar_Gato in ELI5 why is jury duty a requirement? by [deleted]
Assume that a country that has had jury trials for centuries has gotten pretty good at dealing with people who try to get out of jury duty and have the ability to fine and/or imprison you and act accordingly.
GorchestopherH t1_ja8zgjh wrote
Reply to comment by waitforthestopsign in ELI5: Why does looking through a small gap focus vision so well? by longtermbrit
Bingo. This is why a pinhole camera can focus light sources at any distance.
Tradeoff: they are dim.
EarthBoundMisfitEye t1_ja8zdac wrote
Reply to comment by Lunar_Gato in ELI5 why is jury duty a requirement? by [deleted]
I gave 4 examples by name and crime committed. I said the charge and followed by the punishment which was - truth be told - they all got off.
Judge asked if I believe in the judicial system of this county. I said emphatically NO. Obviously. I was dismissed. F jury duty. Bunch of corruption I want no parts of.
Zer0Summoner t1_ja8z9m5 wrote
Reply to ELI5: In simple terms what are Maxwell’s equations and how do they work and what do they mean? by whocaresfuckthisshit
Maxwell equations describe how electromagnetic fields work and how they are affected by different forces. They don't "work," per se, theyre.more like a definition. Electromagnetic energy includes magnetism, electricity, light, radio, all that kind of stuff. The equations are important because you need that information to understand how that energy moves as waves and how to make it move in particular frequencies, which makes the difference between visible light, radio, or other forms of EM radiation.
BigUT t1_ja8z6wt wrote
Reply to Eli5 credit score please. by astajaznan
It shows your ability to pay back debt you didn't need to take on, with money you already had.
It has nothing to do with managing your money well, it's the supidest shit.
rtfcandlearntherules t1_ja8yvyh wrote
Reply to comment by gobblox38 in ELI5: Why does farming equipment require such low horsepower compared to your average car? by thetravelingsong
yeah makes sense.
thetravelingsong OP t1_ja8yds3 wrote
Reply to comment by Naive_Composer2808 in ELI5: Why does farming equipment require such low horsepower compared to your average car? by thetravelingsong
You can plough a field with a 15HP Tractor. My 150hp Civic could not plow a field.
alnyland t1_ja8y6j0 wrote
Reply to comment by phiwong in ELI5: What is the fastest way to stop a car with a manual gearbox ? by navenarf
> and engine braking cannot help.
Can you expand on this? I’ve been driving a manual daily for 7-8 years and I’ve found the opposite of what you say to be the case. I’ve successfully used engine breaking to avoid skidding in some situations.
Engine breaking transfers the energy of you moving into engine rotations instead of via the wheels to the road, so this makes sense. But your statement confidently says the opposite.
Dampware t1_ja8xzkw wrote
Reply to comment by breckenridgeback in Eli5: What does it mean when Fed "raises interest rates"? by [deleted]
Thank you so very much for using your time to give such a detailed answer. Much appreciated!
someone76543 t1_ja8xz1f wrote
Reply to Eli5 credit score please. by astajaznan
In what country?
The details are very different in the UK and USA.
jjreason t1_ja8xo49 wrote
Reply to comment by PM_ur_Rump in ELI5: why does/doesn’t probability increase when done multiple times? by Reason-Local
Unless the crashing plane damaged the departing plane & compromised its ability to function properly. I'll see myself out.
Lebasquiat t1_ja8x08m wrote
Reply to comment by its-a-throw-away_ in ELI5: why does/doesn’t probability increase when done multiple times? by Reason-Local
I've always understood it better with a coin toss. The odds of getting heads 9 times in a row then getting tales on the 10th flip is the exact same as getting heads 9 times in a row then getting heads again on the 10th flip.
fiftybucks t1_ja8wz5d wrote
Reply to ELI5: Why does farming equipment require such low horsepower compared to your average car? by thetravelingsong
Farming equipment is designed to do a lot of work but over a long period of time. It's not racing where time is of the essence. Horsepower is torque over time or how much work you do over time.
Farming equipment needs a lot of torque to move and carry tons of material but it doesn't need it to be delivered quick. So it's incredibly strong but slow paced. Which is also good, slow turning engines don't wear down as fast and are much more reliable.
That's why you can see most workhorse engines are low revving, low horsepower, but have high torque at the low end and usually are coupled with gearboxes that multiply that torque much higher still.
johrnjohrn t1_ja8wxcq wrote
I've understood the math on this for a long time, but can someone here help me understand....... if you rolled a 6 on 1,000 rolls simultaneously, aren't you forced at some point to grapple that the odds of that streak are incredibly, incredibly low, and the likelihood that it will be broken is a fair bet to take on that information alone?
Like, if someone said before the rolls "here, I'll give you a billion dollars if that dice rolls 6 1000 times", you inherently know that that is highly unlikely to happen.
I get it, each roll is independent, but the "gamblers fallacy" doesn't seem like complete fallacy in this scenario. Someone please help me close the gap on my understanding.
I'm guessing someone is going to answer, "You have the same chance regardless of 1,000 rolls". I know. But in a way you're betting now with historic information that 1,001 rolls in a row is likely enough to bet on it.
If 1,000 isn't enough to get us past the "independent roll" answer, let's go with one trillion. One quintillion rolls. I don't care. At some point you would question the validity of probabilites and all that, right?
wubrgess t1_ja8wwyk wrote
Reply to comment by nim_opet in ELI5: Why is skin considered an organ? by PapaMamaGoldilocks
I never leave home without it
GilltheHokie t1_ja8wpb0 wrote
Reply to ELI5: Why does farming equipment require such low horsepower compared to your average car? by thetravelingsong
Horsepower is how fast you hit the wall, torque is how far you take the wall with you. Tractors need torque more than horsepower so they go at slower rpm’s and thus lower HP, but prioritize higher torque to pull big things like a wall.
Bobonob t1_ja8wkv6 wrote
Reply to ELI5: How do cameras exactly work? Why can they see so much clearer and farther than the naked human eye? by PapaMamaGoldilocks
There are three main parts to the camera and the eye:
- the bit that lets the right light in (pupil/aperture)
- the bit that 'collects' the light and channels it to the back (lens)
- the bit that actually senses/ detects the light (retina/sensor/film)
The sensor part of a digital camera is actually normally much worse than the human eye. In terms of pixels, the human retina is 10 to 20 times higher resolution than a professional camera (24MP vs ~500MP)
However, the human eye has very limited lenses to collect and focus light.
Firstly, eyes have only two lenses: the cornea for main focusing, and the inner lens for fine tuning. Photography cameras tend to have more than 7 lenses.
Secondly, the human eye's lens can't change shape much, and certainly can't move. This means it has to be set for 'medium range' to allow you to see things quite close, and quite far. Camera lenses can move as much as we want them to - so we can adjust them for very far distances or very close distances fairly easily. And if we need to go even closer or farther, we can change the whole lens set for a set that is better suited to it.
The reason lenses are so important is that there is light everywhere, coming from all different angles. If we don't have a lens and pupil (or aperture) to focus the light we're interested in, and filter out what we don't want, the image will be fuzzy with mixed signals from everywhere else, regardless of how sensitive the detector inside is.
[deleted] t1_ja8wkm1 wrote
Reply to comment by [deleted] in ELI5: why does/doesn’t probability increase when done multiple times? by Reason-Local
[deleted]
ScaryNeat t1_ja8w8on wrote
In the USA:
Undergraduate degrees
Associate's Degree (AA/AS): 2 years (usually a community college degree, can SOMETIMES be substituted for the first 2 years of your bachelor's degree)
Bachelor's Degree (BA/BS): 4 years (undergraduate degree, usually BROAD (lots of different subjects, history, English, science etc.) but with a major emphasis)
Graduate degrees
Master's Degree (MA/MS/MBA/MEd): 2 years (usually) (highly specialized in a single subject, not broad). If a master's degree is said the be "terminal" it is usually the highest level of study you can complete in that subject. For many years, the MFA (master of fine arts) was a terminal degree, but now places offer a Doctor of Fine Arts.
Doctoral Degree (PhD): 4 years (or longer depending on the subject/requirements, extremely specialized usually focusing on a single aspect of a single subject)
MD/DDS (and other medical degrees) are different and take a long time to explain.
Other pertinent information
AA = Associates of the Arts, AS = Associates of Science(s). Same with BA/BS and MA/MS. The difference here (greatly simplified) is that an ART is a theoretical thing, like philosophy and a SCIENCE is a practical thing, like education. At some schools/programs you can get a BA/MA in education OR an BS/MS in education depending on what you are focusing on. PhD stands for "Doctor of Philosophy" and applies to most subjects as a recognition of the highest level of study you can complete in that subject. Other non-medical doctoral degrees you'll see is the DD (doctor of divinity) and EdD (doctor of education). There are plenty of others, but those are probably the most common (https://en.wikipedia.org/wiki/List_of_doctoral_degrees_in_the_US).
Not all counties work the same. For example, a law degree in the US is a 2 year graduate degree, but a 4 year undergraduate degree in other countries.
Source: Me. I've worked in education for 25+ years.
boytoy421 t1_ja8w7qz wrote
I mean the FASTEST way to stop any car would presumably be to hit something that's well anchored like a wall or a tree.
Barring that I'd imagine immediately throwing a car into park and slamming the brakes and throwing the e-brake would do it but also destroy your car
Bobonob t1_ja903yv wrote
Reply to ELI5: In simple terms what are Maxwell’s equations and how do they work and what do they mean? by whocaresfuckthisshit
They are equations that 'summarise' experimental findings about all things to do with electricity.
Together, they describe/allow us to predict how things to do with electricity will behave.
For example, take the famous equation F=ma.
This describes the relationship between mass, force, and acceleration. With it, we can predict how a certain mass will accelerate depending on the force we apply to it, or any other variation.
Maxwells equations are the same, but much more complex, since electricity and electrostatics are complicated.