ClassyHatter

Apple actually open sourced Swift language, and it's available for other operating systems as well: https://www.swift.org/

Xcode is the app you need to use, if you want to submit your app to macOS or iOS App Store. You can build macOS apps with other tools, but you can't distribute them in the App Store. There are developers who sell their apps through their own websites, or through other marketplaces, such as Steam. And while you can build iOS apps with other tools as well, it's mostly pointless as you can't distribute them, because iPhone doesn't support sideloading. Jailbroken iPhones are an exemption to that.

It shouldn't delete anything. But KOReader doesn't support Amazon's file formats, or DRM, so you either need to convert them, or use the normal UI to read them. Removing DRM is pretty easy, although illegal in most countries, and converting is also easy with Calibre. This guide might help with that: https://lemm.ee/post/58718431.

And read the jailbreaking FAQ: https://kindlemodding.org/jailbreaking/jailbreak-faq.html

Jailbreaking basically lets you de-Amazon your Kindle. You can replace the default user interface and reader app with KOReader, which is more feature rich. This video shows some of the features that KOReader has and some other things you can do with jailbroken Kindle: https://www.youtube.com/watch?v=Qtk7ERwlIAk

Gentoo Linux is another distro that beginners should avoid.

In Finland, we have "heart label" (Sydänmerkki). The label has text "better choice", and it's intended to inform customers about products that are good for heart health. You can find this label pretty much on any product category, including things like cookies, ice cream and pizza. You are expected to know, that the label actually means "better choice for heart health within this product category". So yea, I agree with you on that intuitive part.

For those who have an Amazon Kindle, it's currently possible to jailbreak almost all Kindle models, thanks to a new jailbreaking tool released earlier this year. That includes the latest generation devices, as long as they haven't been updated to the latest firmware that was released last month.

https://kindlemodding.org/jailbreaking/getting-started

Country of origin is a bit of a fuzzy concept when we talk about Linux. For example, Linux Mint (Ireland) is based on Ubuntu (UK), which is based on Debian (Global, but founded by American). So is Linux Mint Irish, British, Global or American? Also, every Linux distribution comes with software that has been written by numerous people all around the world.

It also says that Kentucky Fried Chicken is United Kingdom, and McDonald's is Switzerland.

The iOS app was updated 7 years ago, and clicking the Google Play button leads to “page not found”. Seems abandoned to me.

Their data is crowd sourced, and they seem to have (or have had) users in many countries, so products available in your country might be available. But I haven’t used it so I can’t say what information they provide or how accurate it is.

As far as I know (I'm not an expert), negative void coefficient only affects the fission reaction, i.e. the controlled splitting of uranium atoms. The uranium atoms split into smaller unstable atoms, which decays over time causing heat. If the decay heat isn't removed, the core will melt.

Pebble Bed Reactors seem to be generation IV reactors, and I don't think there are any generation IV reactors in commercial use as of today. Again, my knowledge is limited, but I believe most reactors in commercial use are some kind of water cooled, water moderated reactors. For example, European Pressurised Reactor (EPR) is one of the latest designs commissioned in commercial use, and that design includes 4 emergency coolant systems.

The main reaction can be stopped within seconds, but the secondary reaction cannot. If the reactor isn’t sufficiently cooled by running water through it, it will meltdown due to the secondary reactions.

Qobuz also sells DRM free files in both high resolution and lossy file formats. https://help.qobuz.com/en/articles/10167-what-are-the-different-audio-formats-available-for-download