Recent comments in /f/explainlikeimfive

krattalak t1_iyf8xe8 wrote

OH!OH!OH! I know this.

When you pinch the ribbon and pull on it, if the force applied exceeds what's called the 'yield' force, it causes the outside of the ribbon to deform while the inside of the ribbon stays the same. This induces the curl.

There's actually a study on this. This was the topic of a SciShow video on youtube.

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fixed_grin t1_iyf8t7t wrote

The other thing for this example in particular is that cruise missile technology goes back decades. The Tomahawk was originally built with the finest of (disposable) late 1970s microprocessors. You just don't need a lot of computing power to run "fly this preprogrammed course and explode at this GPS point" or "fly this course and activate your radar after 15 minutes, then fly into a target that looks like X on your radar."

So the idea that a 2010s appliance would have chips powerful enough to run a missile seems plausible.

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zhonzhon t1_iyf8fwc wrote

because why does that ikea furniture that comes in a box take up so much more room after you put it together?

same concept. the download is optimized to be small. installing it might require additional space becuase you have to decompress stuff/spread it out (ie laying out the pieces of the furniture in your living room), then you need room to move stuff around and put it together. once you put it together, you can clean up and are left with the installed size (or the furniture).

this is why sometimes when you have 50GB free and the download is 25GB, you can't install it because you don't have enough temporary room for the installer to spread everything out.

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Geschichtsklitterung t1_iyf8dlo wrote

As others have said, light's behavior depends on the circumstances.

Demonstrating its wavy nature is very easy. All you need is some point light source (e. g. a dia projector with a piece of carboard with a small hole over the objective, a street lamp far away, &c. – do NOT use a laser, you don't want to shine that in an eye) and a piece of aluminium foil with a pinhole in it. Looking at the first through the second you'll see an Airy disk with some rings around it.

It gets mind-blowing if you make a second pinhole in the foil, as near as possible to the first one. Can you guess the result? Spoiler: >!You'll still see the disk and rings, but now with dark interference bands over them.!<

But exhibiting light's particle behavior is difficult and would need a physics lab. You can look up Einstein's 1905 Nobel prize for the photoelectric effect, it's about that.

The next best thing would perhaps be a cloud chamber video?

So the somewhat unsatisfying answer, as we crave clear-cut ones, is that a quantum is neither a particle nor a wave but… a quantum, even if it can behave like the one or the other, depending on the question asked (the experimental setup).

Somebody gave a metaphor for that. Take a cylinder. Seen from one direction it looks like a disk. From another, like a rectangle. Yet it is neither.

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DadLifeChoseMe t1_iyf83ge wrote

Tylenol is well recognized to cause upset stomach. Vitamin C and D, iron, and fish oil can all upset your stomach, as well. Your multivitamin prob has C and D, others would have iron too.

Generally, consuming pills with acidic ingredients on an empty stomach means they are not being diluted, and the environment becomes more acidic than your body is happy with.

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homeboi808 t1_iyf81er wrote

Sadly, we have elderly people who don’t even know how to power off their phones. Add onto the fact of all the people afraid of scams. I have an uncle who Carrie’s around his money in a ziploc bag so he can see if he is missing any cards.

I’m a high school teacher, I have students who don’t even know how to use a laptop. I had a student bring in her own MacBook and I surprise her by being able to right click.

But, we do have bank-to-bank transfers which are free & instant, but only if the receiver & sender banks support that platform. Zelle is the platform most used in the US (vast list of supported banks), but there are of course some that have their own platform they made and aren’t willing to ditch it.

You do have wire transfers, but they take longer to setup (verification), it takes a few days to go thru, and it has a small fee.

This is why Venmo, Square/CashApp, etc. are still around.

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raiden55 t1_iyf7lsp wrote

GF had a small (like 10') laptop, and I had a really hard time finding what the biggest issue was...

Windows failed all update because there wasn't enough space left on the drive, but it never said it.

After a lot of error, it finished by saying he'd like an external storage, and allowed me to use a usb key to run an update.

... but half the stuff still failed...

Also, it refused to run it on a microSD card, dunno why.

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druppolo t1_iyf7lkj wrote

Yes and no.

It depends on what the plane speed, what direction you fly and if you are far or close to equator.

But sure, you can fly west and see continents passing below you while you stay always in daylight or night or whatever. You can easily fly as fast as the earth rotation (1000mph at equator, less and less towards the pole where it’s zero) meaning you will see the sun always at the same angle to you while they planet below you revolves.

This happens only if you fly west as you are chasing the sun going west. To land at exactly the same local time you need a very fast plane, maybe supersonic, or take a route in a northern region with a normal jet (works also south but there’s no destinations close to the South Pole to try this trick for cheap). For example Toronto-Vancouver is 5 hours of flight, and only 2 hours in local time. Meaning you lost your race with the sun but slightly, considering those 5 hours include the plane moving in the airport, you probably lost one hour out of four spent in actual flight. Similarly, London-Vancouver is 9:45 hour flight and 1:45 time difference, quite close to see the earth rotate below you while not moving relative to the sun.

You just need to match the earth rotation speed in your area. Which again can be between 1000 and zero mph. Altho standing still in the North Pole is a bit of a cheat.

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Akalenedat t1_iyf7g2n wrote

>Wrong on so many levels, but explain how it’s 2x the order processing time. They just send the order electronically to a warehouse they don’t own.

Sure, if the dropshipper is an active enough business that they spend money on automating the process. Otherwise, you're waiting for the dropshipper to confirm order info, then send the order to the wholesaler/manufacturer, then waiting for the actual shipper to process the info and pick the order.

>And are companies that list their products on Amazon but fulfill the order themselves bad companies?

I mean, yeah...kinda. A huge chunk of Amazon is fake listings and dropshippers running low cost storefronts to trick people into buying knockoff products.

>If they are fulfilling by Amazon, isn’t that kind of like drop shipping? 🤦🏻‍♂️

If you're buying through Amazons storefront, then no, it's not.

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UnknownMight OP t1_iyf77wg wrote

So the enforcers are incentivized to listen, not due to some sort of knighty sworn oath.

Doesn't that mean once a regime runs out of money in the midst of a revolution there maybe trouble?

"Hey guys your paycheck next month is on hold, please continue shooting girls on balcony though"

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MultimediaMusings t1_iyf6ti3 wrote

The Star Trek: The Next Generation films had this problem. Jonathan Frakes, the actor who played William Riker for 7 seasons on the television series, was given the director's job for TNG movies #2 and #3 (movie #1 was a crossover with the original 1960s Star Trek). A director unrelated to Star Trek was given the nod for movie #4, but the film did poorly and effectively ended the TNG franchise.

It would have made sense to keep the same director-- someone who had been part of the franchise for 15 years and done 2 successful movies, right? But no, the producer wanted "fresh blood," and so picked the director who made Executive Decision, the movie with Stephen Segall on all the posters but who spent only the first 10 minutes in the film. (I'm still bitter.)

So an answer to your question is, "Because of producers who base their decision on their 'gut' or 'feelings'."

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occationalRedditor t1_iyf5z3e wrote

Aircraft don't hover they fly in circles. Usually an aircraft will fly around in a hold pattern which is two straight legs with semi circles at the end, often centrerd on a navigation beacon on the ground. So in that case it would stay over that location.

If an aircraft flies circles without reference to the ground. Flying the same speed all the time and turning at the same rate all the time, it would move with the airstream rather than the ground. If the wind at the aircraft's high altitude is say 100kts (nautical miles per hour) then it would move in the wind direction at 100kts (115mph, 185 kph) along the ground while appearing to just fly in circles.

If the aircraft left the atmosphere (above 100km, but wings struggle much lower) it wouldn't be using aerodynamics at all and it would have to keep itself up by going a lot faster so it couldn't stay still over a point on the earth until reaching geostationary altitudes at 35,000km amd speeds of 3 km/sec (67,000 mph).

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Twin_Spoons t1_iyf5xqv wrote

Essentially, the corrupt leaders treat the people who enforce state power well, from the military and police commanders on down to the rank and file. This keeps them loyal in a direct sense and also makes them less sympathetic towards the people who are revolting.

This doesn't always work. Oppressive regimes get overthrown all the time. Importantly, this usually happens because the people who enforce the power either decide to stop, letting the revolutionaries walk into the palace, so to speak, or to seize power for themselves in a coup d'etat.

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Uhdoyle t1_iyf5wc0 wrote

Planes use special radars called altimeters pointed at the ground to determine how far the plane is from the ground.

The FAA, which makes up all the rules for airline flights in the USA, isn’t 100% sure that the cell phone frequencies we use to make calls don’t sort-of overlap (and therefore interfere) with the altimeter.

Technically, the FCC (who regulate radio frequencies among other things) has made efforts to ensure that these “lanes” of frequencies stay separate, but manufacturers of altimeters were lax with their standards and the FCC was lazy in enforcing that altimeters in airplanes stayed in their lane, and that’s why you have to put your cell phone in mobile mode.

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NotMyRegularUID t1_iyf5sxu wrote

Wrong on so many levels, but explain how it’s 2x the order processing time. They just send the order electronically to a warehouse they don’t own.

And are companies that list their products on Amazon but fulfill the order themselves bad companies?

If they are fulfilling by Amazon, isn’t that kind of like drop shipping? 🤦🏻‍♂️

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OldHellaGnarGnar2 t1_iyf5swx wrote

I'm not sure if I missed your link about breaks earlier, or if it was edited in, but I just now saw it, and it's super helpful. Our robot programs technically use "JMP LBL", not GOTO, but I basically took them as the same thing in terms of function. So it already has labels for each section if I were to restructure it to use nested loops and whatnot.

All of your comments have been super helpful. I've been wanting to learn more programming for a while, but wasn't sure what concepts or practices I'm not even aware of, and this gives me a lot to think about. I recently got the "Automate the Boring Stuff with Python" book, to use as a starting point, but am still kinda learning the syntax and python-equivalent commands of what I already know in Matlab of Fanuc TP, and haven't really gotten to stuff about code structures or paradigms, etc

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blipsman t1_iyf5p8a wrote

Drop shipping is when good are shipped directly from the manufacturer or wholesaler to the end customer, bypassing physical possession by the selling retailer.

There's nothing bad about it per se, as it allows retailers to sell goods it isn't able to hold in its own inventory. But it does limit a retailer's ability to control the fulfillment part of the process, ie. branded packaging, quality control. And may complicate return process.

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