I've searched, maybe my wording is bad, but I do not understand how caffeine content works. In tea, if you steep an 8 oz cup or a 20oz cup, using the same tea bag, is it the same mg of caffeine? Or is it diluted in more water? Does that change if it sleeps for 4 minutes vs 15? Same with coffee. Is amount of coffee grounds the deciding factor, or how long it brews, or how much water is pushed through?

And energy drinks...if you drink a half a can, is that now only half the amount of caffeine?

I heard that the AWP is the highly accurate sniper rifle that set a new standard in sniper rifles. Why is that?

Everywhere I looked said there is no center of the universe, but even if the universe is expanding, can’t we approximate it, no matter how big? An explosion has a central point, why don’t we?

For example, a breakfast in America might cost you 20 USD but in Japan, a breakfast might cost you 2000 YEN. Why is the number in YEN so much higher than it is in USD?

i understand how to access it with a computer and established wifi. but where does the wifi come from and how exactly is it made so that i can access it from my computer? how is wifi made? is wifi the same as the internet? if no, then i have the same questions for accessing the internet and where it comes from, as i do for wifi.

ELI5: Hi, for preparing both homemade mayonnaise and tiramisu raw eggs are used. How come that tiramisu can stay in the fridge for several days and still be safely eaten, but it is recommended to consume mayonnaise during the first 24h after it is made? P.S. I mean traditional tiramisu where both raw yolk and raw whites are used, and mayonnaise made from egg, mustard, oil, and lemon juice.

If a wheel is attached to a car with only bolts, how do tire pressure monitors work and send the information back to the driver?

I had this insanely, awful, worst calf cramp ever while putting my boots on. It was all sudden, unexpected even though I was drinking plenty of water and took like 5 minutes to loosen. I still feel the effects 3 days later when getting out of the car, stretching, etc. Why is this if the muscle fibres have already loosened?

Hi, I recently got back into sports and had an accident that seems to have caused my nail to detach from the nail bed. A few days later, it changed from black to white, and I can wiggle it up and down. Will a new nail eventually grow back and look the same as before, or will it be permanently affected?

I know it’s some kind of algorithm to determine when you’re about to forget something and shows you the data just before that happens, but I don’t get how to use it and get results from it.

As embarassing as it is to admit, ive never understood this. As a secondary question, why does it render the electronics unfixable?

Do they signal different things?

There have been questions on Agile before, in this subreddit, but I want to understand extreme programming specifically, and I couldn't find any past questions on that.

So I know it uses lasers and all bouncing back but I csnt grasp how they detect the laser because if it hits a object at an angle should it scatter and bounce away not right back? And how do you make sure you don't measure the wrong laser pulse etc?

For some examples of what I'm talking about, look up some trans-border cities like this on Google Earth: Brownsville/Matamoros, Calexico/Mexicali, El Paso/Ciudad Juarez, to name a few. In all of these cases, in the satellite view, the Mexican city looks noticeably lighter in color than the American one. Is there some kind of major difference in building materials between the two countries that causes this?

Again, those unwanted secondary side effects are typically drug related and not gender related, meaning that if a drugs is known to raise prolactin levels, it will do so to both men and women.

I understand that stress or excitement can cause bruxism but why haven't we remove this from our gene pool?

It causes more harm than good. Also, facing a stressful situation, a calm person is better than a teeth-grinding, shaking person.

As I see, bruxism is like a sign of weakness. P/s: making this post cause I grind my teeth while sleeping so bad, they start become transparent

Following up on ":ELI5: Why use a discarding sabot?", why do modern main battle tanks use smooth bore guns? Is it because they only fire fin stabilized rounds? Doesn't that limit the types of ammunition they can use?

I mean, with a hard drive, its physically recorded, how can you encode electrical memory into a system that loses current when it turns off?

My 5yo understanding of social media companies and influencers is they make most of their money from marketing based on how much interaction their content gets- views, likes, comments, shares etc.

Do companies like facebook and twitter make money off of bot account interactions with content?

We’ve been having this problem in our building and it’s leading to more package theft.

What is the explanation on the pattern that, particularly in certain ethnic groups such as East Asian and European, females generally tend to have lighter skin tones compared to men?

Like If I have a large image and I want to make it smaller but also keep the quality and I have the dimensions, what would equal what dimensions?

I understand that there are traps for the air, but how do they work? What happens if the air bubble gets past the trap?