Recent comments in /f/explainlikeimfive

hasdigs t1_j23q4t1 wrote

It is almost certainly much more dangerous. Any bleeding in zero G doesn't drain due to gravity so it just keeps pooling up in the same place. Not so much a problem for little cuts and bruises but anything more serious is going to be bad for the mother. Also being in zero G changes your blood pressure quite a lot and causes swelling in different parts of the body so there could be complications to the mother from that and if the fetus was grown in zero G and not just birthed there it is 100% gonna have issues because of that but we don't know what they are.

You could guess at all kinds of things that would probably be not great too but I guess we don't really know til we try, at the very least you would want a team of doctors present.

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marjan21 t1_j23pdgk wrote

"Breaking your back" means that one or more of the bones in your spine (which helps you stand up straight and move around) has been damaged or broken. When you over-flex or bend too much, it can put a lot of pressure on these bones and they might break. It's like if you bend a pencil too much, it might snap. The soft tissues in your spine, like muscles and tendons, help hold the bones together and keep them in place, but they might not be strong enough to stop the bones from breaking if you bend too much.

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marjan21 t1_j23ow4h wrote

When you put your hand or body in cold water, your body's natural response is to try to warm itself up. It does this by sending more blood flow to your skin and by making you shiver. This can make you feel uncomfortable or even cold. On the other hand, when you drink cold water, it can actually help to cool your body down. This can be especially refreshing on a hot day or after you have been exercising. It can also help to quench your thirst. That's why it can feel pleasurable to drink cold water.

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Masseyrati80 t1_j23orzs wrote

Our sense of perception of heat is "hard-wired" to warn us about an environment that's going to suck out our body heat (unpleasant feeling --> avoid when possible), but not to warn us about drinking cold water, as it would have been a bad idea to skip an opportunity to rehydrate when water is available.

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barrycarter t1_j23nwys wrote

You're correct in thinking they are (almost) the same thing, but it's easier for average people (including people starting out in statistics) to think of "fair dice", "fair coin", "roulette wheel" or "what are the chances Ms Johnson has two boys..." versus something like "the discrete uniform distribution of {1, 2, 3, 4, 5, 6}" or "assume an independent binary process repeated 3 times..." or whatever.

So, why "(almost)"? Because, in the real world, there are no fair die, no fair coins (I believe a study recently showed that the way most people flip coins, the side that was up originally is more likely to be up after the flip), gender distribution at birth is unequal (more boys born than girls), and so on. There isn't even really such a thing as a random sample since we have no way to generate true randomness.

So, the whole coin/marbles/roulette wheel/etc thing is just a way to make statistics more accessible to the beginners and the average person

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lector57 t1_j23nv4r wrote

Like in algebra

x² is a function. A formula. X is the variable

Substitute x=2 and you get a value

In prob the random variable X can take different values.

The mass function is a formula. Substitute a specific value of X and you get the probability of obtaining the result X in the experiment

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mazamayomama t1_j23noyr wrote

Mostly because your mouths "wet", a ton of energy is required to heat or cool, water/saliva acts as thermal sink any hot soup or cold popsicles transfer energy only changes a few degrees and absorbs heat readily when changing state (ice/steam). If your mouth or tongue/gum skin were real dry it would be burned or freeze immediately instead. People with cavities, weak enamel, gum disease or Stomatitis are VERY hypersensitive to cold and heat in mouth is painful to them.

Conversely if you ran your hand under hot or cold water before touching something you'd be fine for a bit, is why wet newspaper is used for glassblowing, etc https://m.youtube.com/watch?v=eGqln2ZvTMQ

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responsiblecircus t1_j23n3xo wrote

Yeah, I’m all for people using home remedies and traditional medicines so long as the potential for harm is very low even if it’s mostly placebo effect… but “yoni steaming” is absolutely not something I would ever recommend anyone to try. Too much potential to hurt yourself in a number of ways and essentially zero chance of actual benefit. The uterus is essentially a self-cleaning organ (*unless you have a medical condition that affects it) and there is no evidence that I’m aware of to suggest that harm is caused by any residual uterine lining tissues remaining within the uterus until the following period. There’s a great distinction between that and, say, TSS caused by a forgotten tampon — which can in fact be dangerous. (Why is it different? Primarily because a tampon remains in the vaginal vault and has the potential to harbor lots of bacteria. Generally speaking the uterus is not such a breeding ground.)

Which is a long way of saying: if you have a vagina please don’t try to steam anything out of it. Cleaning the skin outside the introitus with a mild pH balanced soap is more than sufficient for 99% of vagina owners.

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Aururai t1_j23ml4x wrote

Forklifts, at least the older ones generally used lead acid batteries, or a variant, not lithium based. So they are orders of magnitude less energy dense, hence why you would need to swap every 2 hours in a forklift.

I've seen a few warehouses where they had a forklift battery swapping station where there was always one forklift ready for use, so you drive in, grab the charged one and they would swap the batteries on it and get it ready for another person.. but these warehouses had hundreds of forklifts

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lector57 t1_j23lvi7 wrote

The coin tosses is your random experiment.

There are several possible results: 0, 1, 2,3 heads.

The number of heads obtained is the random variable. It's not fixed, you don't know the value until you perform the actual experiment.

The probability distribution is a formula that gives you the probability for each value.

So "what is the probability of obtaining 2 heads in 3 tosses" is exactly the same question as asking the value of the distribution (that is, probability mass function) when X=2

This is similar as in algebra... You have a function, for example f(x)=x² and you can ask it's value for any given x. For example when x=2, the function takes value 4

If you wanted to know the probability of getting no heads, if X="number of heads" is your random variable, you substitute X=0 on the appropriate mass function for this kind of problem

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DeusRexy t1_j23ltxv wrote

Worked in lithium ion battery manufacturing for awhile, people in comments have already mentioned that there are smaller batteries inside the power pack, but no sizes were really told.

Each battery is different, but each of the small batteries I would say the average is something like a Capri Sun pouch, some are bigger, some are smaller. Also, they are pouches, with layered cathode and anode layers (negative/positive), with separator layers between and an electrolyte slurry inside.

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