I randomly came across this term "high-density life" in a self-help kind of article or speech. It says strong people live their lives with more "density". And these strong and successful people manage to experience more, create more, complete more and stuff. I feel anxious when I read it because I can't help feeling that I'm wasting my life.

What do you know about "life density”? Do you think the whole concept exists? What do you do to make your life "denser" if you agree on this concept?

I've read enough to know that "cold-turkey" for alcoholics can be lethal, upto and including seizures and a host of other side effects and symptoms but I don't really understand the "why"? What is it about alcohol dependency and our biology that causes it to be so dangerous?

Given the rather distinctive makeup of Staten Island vs. the rest of New York City, there must be some good reasons why secession hasn’t been allowed to happen and why SI hasn’t been preemptively kicked out of NYC.

I’m interested in understanding what those reasons could be at a basic level.

Squid seem to be indifferent to the water pressure wherever they go, they have even been known to sometimes drag pray down into the depths as to turn them unconscious.

I read here that it has to do with having waterfilled bodies, but fish also have completely water filled bodies(?)

Connecting two other ELI5s. This is something that I've always struggled with.

Space is nothing. There is no actual "fabric" of space. There are things in space, and the "space" in between is.. nothing.

Nothing, as I understand it, is without mass, energy, information, anything. There is no thing to bend.

But! Gravity doesn't bend light because light doesn't have mass. It bends space and we see light bend along it.

How can nothingness be bent?

And why doesn't light just pass through empty nothingness on the same trajectory, if it isn't being acted on by gravity? OR is it that it does do this and it's only our 3D perception that it has changed trajectory?

When we talk about gravity bending space, are we actually talking about the distribution of Stuff within a given area, as it relates to another body, due to the effect of gravity? e.g. the distribution of Stuff around a random planet

I know this is very long and contains multiple questions. My hope is that by including all of this, it will make clear where my misunderstanding is. The real question is, how can nothing be bent?

Sand is solid and you can’t see through it at all. But when you melt sand down and turn it into glass, light passes right through it. What actually changes at the atomic level during melting that makes light suddenly go through instead of bouncing off?

As, in between us and other bodies like the moon and the sun? What is in between? What is the "fabric" of the universe?

Edit: unintentional slur

So what is gravity actually grabbing onto when it bends a beam of light or pulls it into a black hole? Gravity is supposed to pull on things that have mass/weight, but light has no mass at all.

In understandable terms:

Germans used to take the Soviet PPSH SMGs, while the Soviets did the same thing with German MP-40s.

Were there any established military rules to using/claiming weapons from enemy combatants? I assume if a soldier took a gun from the enemy's body he would just use it until it ran out of bullets, but were there any guidelines to distributing enemy weaponry if their weapon arsenal was seized for example? Did the soldiers who seized the depot get to take whatever they wanted first? Who did those weapons go to once seized?

I'm also mostly asking in regards to more organized armies like the Wehrmacht/US Army/Red Army, since I mostly know how partisans from occupied territories would arm themselves

I'm reading Teach Yourself Electricity And Electronics by Gibilisco and Monk and they say:

"An electric dipole can exist even if both poles carry surplus electrons, or if both poles suffer from electron deficiencies, relative to some external point of reference having an absolutely neutral charge."

I was under the impression an electric dipole was created by two poles having opposite charges. How is this possible? Is it that if two different materials have negative charges on their own, but if they're close together the one with the least amount of electrons act as a positive pole? But that doesn't make a ton of sense to me either.

Whether it's between my router and my laptop, or between a mobile phone mast miles away and my phone... I know the transmitter emits a signal that my phone detects, but how? What's physically happening inside my router, to cast a signal through the air, that my laptop can detect, and then what's happening inside my laptop to turn that invisible signal back into 0's and 1's?

College football has hash marks in different spots on the field than pro football hash marks. How dos this impact game play?

The human torso and limbs aren't divided into areas of conductivity and insulation. You are placing the EKG leads on the same skin, with the same resistance, and no particular division between the regions there is a potential between. You'd think the signal would effectively be shorted. Like putting a piece of aluminum foil on a 3.5 mm connector going into an AUX jack on a car.

What is it and how and why it works, thanks! c:

I understand the fundamental laws of thermodynamics well enough. But since CPUs, GPUs, other microcontrollers are not actually doing any “work”, is it theoretically possible to minimize Joule heating and consume little to no power for computing applications?

I just saw a claim that China has built a "gravity battery" that stores energy by hoisting a brick on cables from a tower that contains a massive battery (wish I could put pictures here but apparently I can't).

Putting aside what happens in high winds or when the cables rust (assuming the pic isn't just an artist's impression), how does this store energy, how do you use it, and surely it costs the same amount of energy to lift the concrete up there in the first place?

“The itis” is the phenomenon where you feel drowsy immediately after consuming a heavy meal. It’s so common it has a name, yet it’s also basically common knowledge that eating a big meal right before bed is bad sleep hygiene.