Any-Growth8158
Any-Growth8158 t1_jegkh41 wrote
Reply to comment by breovus in ELI5 Leasing vs Purchasing by SquishyEmerald
100% agree. A financial planner advising to lease is not someone who I want controlling my money--unless you specifically tell them that you only want to drive a new car and get a new one every three years and ALWAYS have a car payment.
Any-Growth8158 t1_jegebvy wrote
It moves a very little. It moves so very little that it isn't measurable because even if you are unbelievably morbidly obese your mass is insignificant compared to that of the Earth.
Let's say you weigh a health 100kg. The Earth has 60,000,000,000,000,000,000,000 times your mass.
Obligatory XKCD reference.
Any-Growth8158 t1_jegdakv wrote
Reply to comment by Daddydeader in ELI5: What actually happens when you call your representatives? by glitterismyantidrug_
And if you're rich enough and they think they might be able to squeeze some of that out of you, you may get to actually talk to the representative directly.
Any-Growth8158 t1_jec1zi6 wrote
Reply to ELI5: Desalination Economics by twodollarprophet
Desalinized water costs between $2.50 and $5 for 1000 gallons (down from closer to $9 a decade ago).
Freshwater costs around $2 for the same amount.
This means your water bill would go up from 25-150% if you switched completely. Even if you don't use that water you'll get charged for the creation of the plants. About $85 of a $150 water bill is for infrastructure and administration (I have to pay this even if I don't use a drop of water). The water I actually use only accounts for less than half my bill.
Any-Growth8158 t1_jeb55bg wrote
Reply to Eli5: On a production line, how do they make a car, plane or anything else be identical from one another without differences? by SideburnG
They don't. They're all slightly different, but mostly the same.
They specify that the components be made within a certain tolerance for dimensions and other properties. They are designed that as long as the parts are within those tolerance the composite machine will work as intended. You can replace any part with another part that meets the original specifications and it'll work.
Any-Growth8158 t1_je7vkqj wrote
Reply to eli5 What would happen if I had a big enough airplane to throw a ball around then the airplane turns while the ball is in mid air? by the_lost_cheeto
An observer on the plane will see the ball curve with the curvature more or less based upon how quickly the plane is turning.
Now lets look at it from someone in a plane flying parallel to the original plane that doesn't turn (and we'll assume the plane with the ball is transparent). An observer on the second plane will see the ball follow almost the identical path as the ball without the turning plane. The path will not be exactly the same because the air is moving with the plane and it will exert a force on the ball in mid-flight, but this force isn't terribly strong--which is why you can throw the ball through the air in the first place.
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.
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.
Any-Growth8158 t1_je6qrop wrote
Reply to comment by IndependenceCold4261 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
I said how they make money. Gift cards are easily (and legally) able to be converted into cash. There is a secondary market for gift cards where people will pay you pennies on the gift card's monetary value. If you have nothing but time investing in obtaining the gift card then it is pure profit.
Any-Growth8158 t1_je6prmb 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
Gift cards can easily be converted to cash relatively easily and anonymously. You can do so without being in physical possession of the card--you generally just need to know the card's number.
Any-Growth8158 t1_je6c279 wrote
Reply to eli5 What is Equity in a Home? by ShadowLotus89
It is the value of the home minus how much you owe on the home. When you buy it, your equity in the home is essentially your down payment. You increase equity by two means:
#1) Pay down your mortgage
#2) The value of the home increases
You can actually have negative equity if you purchase a home at the top of the market. When the market falls you may owe more on your home than it is worth (happened a lot around 2008).
Insurance has nothing to do with equity, so you or your father misunderstood what was going on here. I do not believe a mortgage lender can require PMI (private mortgage insurance) after escrow closes and your equity falls below 20%. It is possible if the home value went down and your father tried to refinance they would require PMI if his equity dropped below 20%.
Any-Growth8158 t1_je6b30p 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
For the Colosseum (Flavian Amphitheater) and many other structures it was because the buildings were no longer necessary, and the materials used in their construction could be better used elsewhere. Many cathedrals and other public works were created using the stones of ancient buildings. If you look closely at the Colosseum, you'll see thousands of little holes. These are from people who harvested the iron clamps the Romans used to hold bricks together.
Any-Growth8158 t1_je64scf wrote
Reply to comment by Moskau50 in ELI5: How are scopes (like for sniper rifles) accurate? by CRTScream
I believe real scopes also have the ability to dial in a wind which adjusts the horizontal direction of the scope--or maybe they just manually move over a couple lines.
Any-Growth8158 t1_je2dxol wrote
Reply to ELI5: If digital data is stored in 0s & 1s, how does the reader know how many of the digits to take into consideration? by distinct_oversight
Bytes are usually organized into words which can be multiple bytes and are the basic unit handled by computers (primary width of the registers used by the CPU usually). The computer itself just performs the requested operation on the word whether that is some arithmetic, logical, store, rotation, shift. The computer does NOT care what the data represents it it just does what it's told.
Interpretation of the data is left up the the software. I (or my compiler) will frequently stuff multiple items within a single word. I do a lot of microcontroller stuff and we are very limited on the amount of program and data memory available. My code will know that my data is located in bits 4 through 8 of the word--because I wrote the code and designed it that way. To access this data I need to do extra operations like shifting the word 4 bits to the right and then masking (setting to zero) all the bits 4 and greater of the word. This leaves me with the data of bits four through eight.
In the example above I've reduced the required data memory by packing the data into just the required bits; however, I've slowed down my code--it requires extra operations to access the data. On modern computers, the memory is essentially limitless and you'd never really bother to pack the data. Speed is more important so you'd just put your 4-bits of data in its own word and waste the unused bits. (I'm talking simple program data/variables--if you're doing movies or something you will likely compress the hell out if it).
Any-Growth8158 t1_jdeji98 wrote
Reply to ELI5: How do the new airplane windows that turn dark using a button work? by gazpachosoupday
They're LCD screens without the reflective part. There is a polarization filter and the liquid crystal. When the polarizations are aligned it lets light through. You can control the polarization of the liquid crystal by applying a voltage. The greater the polarization mismatch the more of the light that is filtered and the darker the window.
It's the same idea to taking two polarizing filters and rotating them relative to each other. Instead of mechanically rotating one filter you adjust the molecules with an application of electricity to change the polarity.
Any-Growth8158 t1_jd9o6sw wrote
Reply to comment by Buttleston in ELI5: How can songs be in a certain key? (And a few more questions about music) by Glum-Airport-4701
Not only does the key of C use primarily certain notes, it also places emphasis on a subset of those notes. Musical phrases (a sequence of notes that form a musical "sentence") will tend to start or end with one of the main notes--especially the root of the key (it's name).
Of course much of the best music ignores many of the rules, but you have to know when to do so to make them sound good usually...
Any-Growth8158 t1_jd93xxv wrote
I'm assuming you are talking about the orbital period of the Earth? Years do change as we change definitions of time, although these are small.
The Earth is actually moving very slowly away from the Sun, so years are getting a little longer, although the difference is pretty difficult to measure.
The Sun pushes the Earth away due to the solar wind, but this actually has very little effect. More important is the mass loss by the Sun via the solar wind (and fusion reactions). The Sun loses a mass of about 8 Earths per year. One site I saw said this has resulted in a net loss in velocity of 22 m/s over the life of the solar system--fairly insignificant to the current 29.78 km/s
If you go back far enough, then the Earth was involved in major collisions. These could have had great effect on the orbital period by (mostly) adding large amounts of mass.
Any-Growth8158 t1_jaemck9 wrote
Reply to ELI5- Given the average cost of a cup of coffee is marked up about ~80%, why hasn’t a company come in and charge significantly less to take a greater share of the market? by Educational_Sir3783
All drinks are marked up a significant portion--it's where most profits come from in the restaurant world. You can buy coffee for a lot less. It probably won't be as fancy, but it'll probably be of similar quality for less.
People also generally perceive something that costs more as tasting better (this has been shown in several blind wine tastings). It's also something of a status symbol (although the people getting it probably won't admit it). Look at me I can pay a lot for a fancy looking cup of coffee. This is the same reason will buy a purse for thousands of dollars when one of essentially the same quality could be made and sold for under $100.
Any-Growth8158 t1_jael866 wrote
Reply to ELI5: Is a high speed transcontinental rail system viable in the US with the Rockies/Appalachian ranges? by [deleted]
No.
People won't pay the money when they can fly.
The reason high speed rail isn't a thing here is because the USA is a large country that is relatively sparsely populated compared to the regions in which high speed rail is used. The population density is too low in the US.
The size of Europe is only slightly larger than the US, but it has almost twice the people. China is a bit smaller than the US but has about 4 times the people.
We have a relatively high speed corridor on the east coast where the population density makes it viable.
They're trying to do it in California, but our population density is not sufficient to support it. It's a giant boondoggle for our local politicians to receive bribes and kickbacks from construction and design companies. In 2015 the projected costs for the "high speed train" (which they have since admitted wouldn't be all that high speed) was $10 billion and they were going to offer tickets for around $70 from LA to SF. The current estimate to complete the system is $100 billion and they haven't even really started so you can probably double this number. Do you think they're still going to offer $70 tickets when the costs will be over 10 times the initial estimate? Would you pay over $100 each way for a ticket on a train that'll take you 3 hours in travel time when the cost is closer to $60-$100 round trip for a 1 hour plane ride?
Any-Growth8158 t1_jae1d91 wrote
Reply to comment by Personhuman815 in ELI5 How do you calculate pressure? by Personhuman815
The speed has nothing to do with calculating pressure. You need to know the mass, acceleration, and area. Furthermore, while pressure itself is a scalar, for non-simple geometries you need to know the vectors of the acceleration and area.
Most people will tell you that pressure is force divided by the area. This is true, but is making an important assumption--the force is normal to unit area.
If you had a square of 1 m^2 and exerted a force of 10 N over its entire area, what is the pressure? The answer is we can not determine from the information provided. If the force is normal to the square then the pressure is 10N / 1m^2 = 10 N/m^2. If the force is inclined at a 45 degree angle then the pressure is 10N*cos(pi/4) / 1 m^2 = 10sqrt(2)/2 N/m^2.
Things get even more complicated if the force is not evenly distributed in which case you'll be doing some integration.
Any-Growth8158 t1_jadyq1a wrote
Reply to eli5 how fast charging works for phones. by Phoenix_3222
Some fuel gauge chips require training on a battery (a few charge cycles) to "learn" what the actual state of the battery is. They'll initially be less accurate and get more accurate. I'd guess that is why your charge time went from 40 minutes to 74 minutes if all else were equal after two weeks of use. That isn't sufficient time for your battery to degrade that much.
Another possibility is temperature. There is a good chance your charger IC will throttle maximum charge current depending upon the temperature it measures.
Any-Growth8158 t1_jadpkrz wrote
Reply to comment by thatsjustfuntastic in eli5 if light is a wave what medium does it travel through? by thatsjustfuntastic
No. The changing electric and magnetic fields are the wave. A electric and magnetic field can change without a medium, although until semi-recently many scientists thought that a medium was required for a wave to propagate. They hypothesized an all pervasive static medium called the aether. The Earth and all heavenly bodies traveled through it.
In the late 19th century the michael-morley experiment showed that there wasn't a static aether. It determined that light travels at the same speed in perpendicular directions. If light was propagating through a stationary aether then the light would have taken different times to travel one way vs its perpendicular since the Earth, the galaxy, and everything else is moving.
Relativity further poke a hole in the bottom of the boat for an aether since it doesn't accept a static absolute reference frame for anything. And a medium would not support everyone everywhere agreeing that the speed of light is the same.
Any-Growth8158 t1_jab58rz wrote
Reply to comment by macph in Eli5: When/How did the world realize that it wasn’t the same time everywhere? by Ice_Ice_Fetus
Excellent point about the importance of measuring time to determine longitude. Probably the main driver for more accurate time keeping during the Era of Exploration.
Any-Growth8158 t1_jaanqnl wrote
Reply to Eli5: When/How did the world realize that it wasn’t the same time everywhere? by Ice_Ice_Fetus
When it took months to cross an ocean no one really cared. Everyone just used their own local time. Most people didn't need to subdivide time that accurately. Sun comes up you work. Sun goes down work is done. Sun is at the highest point in the sky it's noon. The fact that the time wasn't the exact same as a town a several miles and hours away by foot (or horse) didn't matter.
Any-Growth8158 t1_jegvgqb wrote
Reply to ELI5: If Ozempic and similar drugs just make you feel fuller faster, how will it not force your metabolism to crash like any other highly-restrictive diet? by RevelryByNight
Ozempic is not a weight loss drug although it is used by people for that purpose.
Ozempic is a diabetes drug the reduces glucose levels by stimulating insulin secretion. It is the reduction in glucose levels that result in weight loss and why "healthy" people are using it to lose weight.