Edit: Question answered. Thanks!

Don't be too hard on me, I almost failed chemistry:'(

You pay into a pot and the pot pays you money you paid in after you retire?

Country for reference : UK (not sure if this makes things different)

I have a metal charm on my keychain that used to be very shiny. Due to wear and daily usage on my keychain on some parts it has gotten a deep black color while on some others it looks copper-y, why is that?

A pdf file doesnt have any special permissions or anything so i cant think of any way that itd be able to
is viewing a pdf file in chrome completly safe?
how does editing a word document leave you more vulnerable than if you were just viewing it?

Before computerized analytical models became common place how did bookies set odds.

Was it just through a hell of a lot of mathematics and statistics or was it just more of a guestimate as to what odds would make the bookmaker a profit in the long run?

I’ve been in a meeting for around 4 hours and have had to reapply lip balm (I use aquaphore) about 6 times. I’m not drinking or talking, and not licking my lips. Where is it going?

People can't choose to stop buying these things like basic foods, energy etc. so how is raising interest rates supposed to help?

What is it and why does the body do it? It seems like the mind is telling the person to do something but one cannot get themselves to actually do it.

I was on a flight recently that had the dimmer style windows instead of the old style where you would just pull down a shade. I wondered how the glass could be made to go darker or lighter at the push of a button?

Saw a video recently looking at houses in Bermuda and rain collection. They claimed that the ridges on the roof increase the surface area in order to increase rain capture. Surely rainfall is even over a surface regardless of terrain and therefore a ridged roof would collect the same amount as a smooth slopes roof?

We had an livestock epidemic outbreak and it say it doenst affect human if we eat it why do we kill it ?

Colors from RAW images look different than "raw" colors in real life and somehow... "ugly". Of course these files needs post-processing so the colors of those will be better and life-like, but I think there is something about the camera, the sensor... so that RAW files look like that.

I'm looking forward to reading interesting explanations from you guys!

Is it strictly a developer decision to allow thier games to be moddable or not ? And how is it achieved ? Are moddable games "coded" differently than non-moddable games ?

Like, I know regex's are used for pattern matching in strings to do stuff like search and replace, but for a bunch of related strings instead of just a single specific string. But what I don't get is what exactly makes an expression "regular". I was looking at Wikipedia, which gives the formal definition of a regular language and a regular grammar as being a language/grammar that follows a specific set of rules, which it lists, but the rules are really abstract and hard to understand the way they're worded. Can I get a simple explanation, in layman's terms, of what exactly it means?