Recent comments in /f/explainlikeimfive

Competitive_Thing_89 t1_jeg44kd wrote

Amygdala seems to be related. Do not know if it release any chemical tho; >Charles Whitman lived a fairly unremarkable life until August 1, 1966, when he murdered 16 people including his wife and mother. What transformed this 25-year-old Eagle Scout and Marine into one of modern America’s first and deadliest school shooters? His autopsy suggests one troubling explanation: Charles Whitman had a brain tumor pressing on his amygdala, a region of the brain crucial for emotion and behavioral control. https://www.scientificamerican.com/article/how-responsible-are-killers-with-brain-damage/

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CautiousCold8392 t1_jeg3v46 wrote

>No, those are at best just any logarithmic spirals, the factor is not the golden ratio or otherwise Fibonacci-related.

It is true in some cases but not all. Even though there may not always be a connection between math and nature, there are still instances where the golden ratio and the Fibonacci sequence can be seen.

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wildfire393 t1_jeg3nog wrote

The trick they do with seedless watermelons is really neat.

Basically, they have strain A of watermelons that produces seeds. They take it, and make strain B by doubling up every chromosome. The chromosomal composition of B is the same as A, so the resulting plant behaves the same and still produces seeds. You can then make offspring plants with one A parent and one B parent, taking half the chromosomes from each - so it gets, for instance 15/30 from A and 30/60 from B. The resulting plant is still chromosomally equivalent to A and B, but it has an odd number of chromosomes - 45. So when it goes to create sex cells (which grow into seeds), it can't, because those require that the chromosomes be evenly split. So it grows fruit that are identical to A/B, but that don't produce seeds.

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RhinoG91 t1_jeg3nbo wrote

What? How did you come up with that?

No, the only difference is the position of the sun at any given instance in time. Google midnight sun or 24 hour darkness.

When it’s noon in one time zone, it’s noon everywhere in that time zone. Latitude has little bearing on the time. Our timekeeping is just to maintain a standard. Call someone in NorCal at noon and they’ll say it’s noon. Not 12:01. The sun would be lower in the sky compared to socal due to earth’s curvature, but “standard time” is just an agreed upon construct so we can all be harmonized.

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fairie_poison t1_jeg3muz wrote

Heres a map of sunset times throughout the timezones of the US. you'll notice that the closer you get to the "border" of the next timezone west, without changing your clock, the later sunset it.

https://cdn.theconversation.com/infographics/120/12cc5a0adf037d84383fbe28a54dc8a1e726dbac/site/images/status_quo.png

https://theconversation.com/the-hazards-of-living-on-the-right-side-of-a-time-zone-border-116630

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thalassicus t1_jeg3f3k wrote

If the metric is brand reputation and connections, top schools are great. If you need competency, it’s much more hit and miss. Up to 1/3 of all Harvard graduates have a legacy admissions component with many of them being untalented trust fund brats who are a disaster in the business world. We stopped hiring Ivy league MBAs after repeated issues vs someone who forged ahead on their own dime at grad school.

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DarkAlman t1_jeg3du0 wrote

Ticketmaster has been raising it's rates due to a combination of inflation and post-pandemic demand.

The cost of touring with a band has increased a lot, and many smaller bands just outright refuse to tour right now because it costs too much and they can't justify the ticket prices.

They also adapted a system of Dynamic ticket prices where rates change based on demand much like Hotels or Airlines do. So the more in demand a show, the higher the prices get.

Why aren't competitors undercutting them?

They are trying, but you can't really compete with Ticketmaster

Ticketmaster is a functional monopoly and also controls most of the venues so you can't compete with them. If you do they'll just buy you out or bury you.

Congress is long overdue to step in and enforce anti-trust laws again Ticketmaster

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Hefty-Set5236 t1_jeg3aiy wrote

Time, as we track it, is our own invention. We get to say what time it is somewhere. Is the time different place to place when we compare where we are to the sun and moon? Yes. But we set the time zones, which we do hour to hour, so differences of minutes don't make a difference.

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MidnightAdventurer t1_jeg32az wrote

Sure, you obviously have a political point to make with your example...

My point was that in a conversation about statistical method, it is really important to make it clear that you need to be really careful that the statistics you collect and examine actually support the conclusions you make as this is a really, really common mistake

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SpiralSuitcase t1_jeg321s wrote

Yes, because Time Zones basically came around with the advent of the railroad. It was important that everybody agree on what time it is, otherwise it would be impossible to plan anything. The earth spins at a constant rate, meaning that the sun goes across the sky at a constant rate. It would just be completely impossible AND useless to split the entire world into, say, 1-minute time zones.

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schoolme_straying t1_jeg2ui1 wrote

Each location has its own local time. This didn't matter for most of history.

Once we had trains there was a need to ensure that clocks were synchronised to ensure that trains departed at the same time for everyone concerned. These times meant there was a need to have standardised time over a large area.

WWI in Germany saw the need to make maximum use of available daylight in factories and this practice of daylight saving was quickly adopted in high latitude locations. In equatorial locations there is no point in daylight saving as sunrise and sunset don't vary much throughout the year.

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DefenderNeverender t1_jeg2qmv wrote

One thing I'm not seeing mentioned here, and I think it's worth noting, is that if you put together any document like a DNR or a living will, it must be notarized before it can be considered legally viable. Just writing "do not resuscitate" on a piece of paper (over-simplifying but you get my point) is not going to mean anything if anybody tries to dispute it.

Best bet, go through a site like LegalZoom to get it put together if you can't afford a lawyer for a will-writing session, and make sure it's all wrapped up with a notary so you don't have to worry about someone making a decision on your behalf that you don't want.

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MidnightAdventurer t1_jeg2p7s wrote

This comes back to a system of accounting called "double entry bookkeeping". Basically, whenever you have a transaction, it should affect at least 2 separate accounts e.g. a loan gets you $10k in cash, but adds $10k to your liabilities (debt) so overall, the loan hasn't changed your financial position because you'll have to pay it back later. This allows for a cross check to make sure you haven't missed anything in your accounts.

If you do a job on account (get paid later) you get income so you add this to your "sales" account as a debit (increase in assets) but I also need to show where this money is going so I credit my wages and inventory accounts to show that I no-longer have the materials I used and I have to pay my people. I also need to credit my profit account for the left over money. Now my debit (the sales revenue) balances the credit (what happened to that money). The money owed to me counts for accounting purposes as an asset equivalent to having the cash though we also need to track cash since I can't transfer that debt to my suppliers to pay my bills

Later, I get paid for the job so now my "sales" account is credited (reduced) because I am no-longer owed money but my "cash" account is debited (increased) as I now have the money in my hand / bank account. Again, my books still balance - since this was just collecting money owed, my overall position hasn't changed.

Balancing the books means going over all of your accounts and confirming that they all agree with each other. (Also see debits and credits)

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DarkAlman t1_jeg2n73 wrote

Tracking time is entirely a human construct

There's no reason we can use a Universal clock for the whole planet. Technically we have that UTC or Universal Time, also called Greenwich Mean Time or GMT.

The problem is that people base their day on the time. Noon is when the sun is the highest, you go to work for 8am, etc

If you use Universal time noon would be in the evening in North America and people don't like that. Which is why timezones exist.

Timezones are kinda, not really, but mostly just lines drawn on a map that says "for this area the clock will be X hours ahead or behind GMT so that noon is when the sun is directly overhead"

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TheDeadMurder t1_jeg26cx wrote

Contrary to popular belief, electricity doesn't work like how most people believe it does, such as electrons don't move through the wire and circuits don't need to be connected to work, the reason this is taught is because that's the simplest way to explain it

What happens is that electrons are accelerated and dump their energy into protons, then accelerated again by the magnetic field that forms when a power source and load are in a circuit, if you have an electric toothbrushes, wireless chargers

than that's how they work without happening to having to be plugged into by a cable, that's also how transformers covert a high voltage to a lower voltage since the gap between them the two circuits are insulted by enough air to reduce the voltage enough

In most cases, the air is a good enough insulator that this isn't an issue, but once you get to a high enough voltage you do like with your example of high voltage lines or Tesla coils

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Chromotron t1_jeg24iz wrote

There are multiple ways to define Fibonacci numbers:

  • Set the first two to be 0 and 1, and every after as the sum of those two preceding it: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ... .
  • The number of different ways to form a strip of fixed length by glueing strips of lengths 1 and 2 together.
  • The number of binary (only 0 and 1 allowed) sequences with a fixed number of digits, and 1s must not be consecutive.
  • Via Binet's formula as ( φ^n - (-1/φ)^n ) / sqrt(5).
  • [many more]

> how it it's supposed to be in all nature and that's sacres geometry...

That's a myth at best, and a lie at worst. There are some very few instances where they somewhat appear, but those are one in a million things. None of the claims of golden ratios appearing within humans, plants or animals has ever withstood scrutiny, sqrt(2), 1.5 and sqrt(3) are just as probable and nonsensical.

Edit: spelling.

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