Recent comments in /f/explainlikeimfive

Steamer61 t1_jeflyd1 wrote

Because the government never wants to look bad.

Statistics are often manipulated to make things look better or worse than they actually are. The Federal government is especially good at this.

Sometimes it is also just complicated as hell to ascribe a number to something.

There is almost always more to the story than any 1 number that describes something like "Inflation".

−4

whomp1970 t1_jeflppv wrote

It's a lot more complicated than that, and I'm not really the best to explain that. I don't really understand the math myself, but I do understand the basic idea they're explaining.

But I think of of the keys is, you have to look at a much larger patch. Like, everything in that image, plus a few more equally sized blocks, together, don't repeat.

0

enjoyoutdoors t1_jeflixr wrote

Licensed medical practitioners are, somewhat simplified, taking an oath that they will always, always, always try to protect lives and help someone else avoid death.

In some beliefs, it's considered sinful to get medical help instead of accepting that your time has come.

This has created the need for some sort of middle ground gray area.

And that's what the DNR is for. If you tell your hospital that "if my heart stops, allow me to go peacefully", they will attempt to respect your wish to go when it's time to go, instead of attempting to keep you alive.

It's probably a hint mentally complicated for nurses and doctors, knowing that they COULD save someone, if that person actually wanted to be saved.

2

Youwillgotosleep_ t1_jeflcph wrote

As someone with a working knowledge of pharmacology and anesthesia, this right here.

Edited for terminology and corrections: The GABA receptor has a maximum effect that can be elicited from benzos. Once the receptors on it are bound by benzos there can be no further action, a ceiling effect. When other substances are added such as alcohol and narcotics they cause respiratory depression by means of other receptors, in the case of narcotics the opioid receptors, mu, kappa and delta. In the case of alcohol it ties up a different receptor on the same GABA neurotransmitter so it potentiates the effects caused by GABA activation. Other substances can also have the same effect as alcohol. This is essentially what happened to Anna Nicole Smith.

68

Emyrssentry t1_jefkwkh wrote

High voltage lines have the ability to ionize the air around them, and turn the air into a wire. If that area of ionized air can reach something that grounds the wire, you'll get an arc. This is lightning.

And so if you get too close, the wire could ionize the air around them, and that ionized air touches you, and since you can ground the wire, it arcs to you, causing electricity to flow through you, potentially stopping your heart.

8

nighthawk_something t1_jefkp8a wrote

First you use diodes to turn the negative part of the AC wave positive.

So now you have a bunch of bumps that are all from 0 to 110V (in the case of 110VAC).

Next you use capacitors to store energy from the bump so the voltage doesn't drop anymore.

Then you add resistance to bring the voltage down to what you want to use.

2

Priceiswrongbitches t1_jefk1zk wrote

I guess I'm not really getting it. I starred a couple of the dark blue hats here. It looks to me like these are the exact same orientation and every other shape around them is the same too. So this pattern has already repeated itself just within a roughly 10x5 block of hats. Am I missing something?

3

tezoatlipoca t1_jefjvfd wrote

In an AC or alternating current power line, the current flows first one way, then the other. The current, and/or the voltage if you want to think of it that way, literally changes direction (or from +V to -V) following some type of periodic or cycling wave: a square wave, or a sine wave.

The problem is, a lot of power sources that aren't large turbine or rotationally driven generators tend to produce DC or direct current - which does not alternate. Solar panels, batteries etc.

So what a power inverter does is convert a flat Direct Current into a sinusoidal - or at least periodic, repeating - wave. One does this with mechanically flipping switches or relays or with transistors (or derived digital logic circuits), which are really just silicon based switches. For half of the cycle it sends current one way, for the other half it sends current the other way. By designing the output of that circuit carefully with the right components you can essentially get a square wave. By adding removing some additional harmonics with additional switches and components ((diodes, resistors, capacitors)) you can change the shape of that square wave into a sine wave.

32

Ippus_21 t1_jefjsli wrote

Grass is primarily cellulose. It's difficult for most animals to break down into usable nutrients, but ruminants, like cows, have multiple stomachs that act as fermentors/bioreactors, where specialized bacteria break down cellulose in a way that provides nutrition for the cow.

Grain is primarily carbohydrate and protein, which is why it's sought after by animals that lack ruminant guts.

When cows are fed on primarily grass, it means a) they're usually out wandering around a pasture and b) they're eating their typical diet. This tends to produce lean meat and mean that the cows weren't primarily crammed in a feedlot.

When cows are fed on primarily grain, the energy-density of their diet is much higher, and it takes much less effort for them to break down, so they tend to put on more fat. "Grain-fed" typically means they were raised on a mixed diet and "finished" on grain (fed a primarily grain-based, energy-dense diet toward the end of their lives), which results in fattier, marbled cuts of meat that may be more flavorful/tender.

1

I_AM_A_CLICHE_IKNOW t1_jefjf4d wrote

They don't. They can only guess. As far as I know, no dinosaur fossil has ever been found with a hyoid bone, which is part of how we're able to make noise and speak. That doesn't mean they couldn't make sounds. It's quite likely they could, at least some of them. Think less high pitched chirping ala birds today, and more hissing, rumbling, and trumpeting.

16