Recent comments in /f/explainlikeimfive

Flair_Helper t1_j6bzgob wrote

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LoneStar2911 t1_j6bzgee wrote

Disputed perhaps, but not disproven. At least, not to my knowledge. I would say the majority of doctors, biologists, etc still agree on “you should drink x amount” (typically depending on your body weight). But yes, I’ve heard of it being disputed. And as the other commenter said, I was also told that once you’re thirsty, you’re already showing signs of dehydration. Until it’s widely accepted that there’s no need to drink unless thirsty, I’ll stick to what I’ve been taught this far. Besides, I don’t like being thirsty. lol

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explainlikeimfive-ModTeam t1_j6bzgby wrote

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1

ZacQuicksilver t1_j6bxspm wrote

They are more recent.

There were hundreds of units of distance a long time ago, when there wasn't a lot of communication or cooperation between nations - or sometimes even between cities in a nation (see: China, Rome). As humans spent more time interacting and cooperating, we standardized our measurements; but the US stubbornly refuses to change from the system it uses.

However, electricity was discovered and measured recently enough that competing units of measurement never got established enough for there to be significant argument over which units to use.

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Sloloem t1_j6bwua0 wrote

The Wireless Communications and Public Safety Act of 1999 requires any cell phone be able to call 911 on any network it can find the signal of, even if it has no service available on that network so that you can use deactivated phones or make 911 calls to local emergency services in areas that might not have official 911 service.

There is a difference between a lack of signal and a lack of service. Without signal your phone can't find a network so nothing could work. Without service your phone might be able to communicate with a network but might not be activated, or it might be another carrier's network where you don't have a roaming contract, etc. If the network is there, you can call 911 even if the phone is locked or doesn't have a contract. But if there's no network you're up a creek without a paddle.

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Ellykos t1_j6bvvnz wrote

If you didn't know, Z, Q and R are also used. Z are for the integers (-inf to +inf) while N are the natural numbers (0 to +inf). Q is for the rationnal numbers, all the numbers that can be written as a quotient a/b where b isn't equal to 0 (you also have Q' for the irrationnals like pi). Finally R are for the reals. It's important to note that each categorie can contain some of the other categories. For example, all natural numbers are integers, and all integers are real.

EDIT : As commented below, apparently 0 isn't included in N, but in N* (Natural numbers including 0) or W (Whole numbers). Didn't learn it that way, but maybe some people did ?

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CyreneDuVent t1_j6bvuxp wrote

If there is truly zero bars of coverage of any network in the area, you cannot make emergency calls.

There are two situations in which you can make emergency calls even when your phone shows no service. Firstly, if your provider doesn't have coverage in the area but another does, you can make calls using that other network. There is software built into phones that allow them to access networks that they don't have sim cards for to make emergency calls. Secondly, if you don't have a sim card, don't have a plan, or your sim card is broken, that same tech lets you call emergency services without a plan. Your sim card just gives information like your number and access to normal phone services - it's your phone's antenna that actually makes the call

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kdieick t1_j6bvhq3 wrote

You don't. When you don't have service, you don't call anyone. Maybe you can call 911 on someone else's phone that has service.

EDIT: If by "service" you mean you don't have a paid subscription, then the carrier provides 911 calls for free anyway by law. If you mean you don't have service because of lacking signal, then you can't call 911. Both are a lack of service.

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TremulousHand t1_j6buhqh wrote

I almost never drink the American macrobrews, but I was curious about looking into this. While rice is common, corn is actually more common (especially in the form of corn syrup). Hilariously, many companies pass both ingredients off as variations of "fine cereal grains" without actually specifying what they mean exactly.

Of the 13 most popular beers in the US (rankings based on what I found in a USA Today article), three have rice, nine have corn (usually syrup), and there's only one with no rice or corn.

Rice: Bud Light, Budweiser, Michelob Ultra

Corn: Coors Light, Miller Lite, Corona Extra, Modelo Especial, Natural Light, Busch Light, Busch, Keystone Light, Miller High Life

No rice or corn: Heineken

I do think calling them barley flavor rice sake is a bit unfair to sake, which has a much more complicated fermenting process than beer. In any event, I had no idea how much corn syrup goes into cheap American beers.

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_plinus_ t1_j6bsxb0 wrote

Imagine you tie a golf ball to a fan and lie beneath it and mapped its position. The golf ball would make a circle, and we could graph its movement using the x-y coordinates.

Now imagine you’re looking at the golf ball from the side. It’s still making the same movements, but it’s difficult to graph it’s movement because it looks like it’s only moving along the x axis.

In this example, imaginary numbers are the missing coordinate plane. They help us graph the behavior even though part of the movement doesn’t necessarily make sense/isn’t visible from our perspective.

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Birdie121 t1_j6bsvva wrote

Electricity interrupts nerve impulses, which isn't helpful for microorganisms without nerves. It could help with nematodes and some some other animal pathogens. But water isn't a very good conductor of electricity and it would be hard to ensure that it's effective at killing everything rather than just some/most things.

Another way electricity kills stuff is by heating up the organism enough to cause severe tissue damage, but this is difficult to do with water and will take a lot of energy. Boiling has the same effect.

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