It’s best to start at the fundamental principle of nature before diving into the specifics of how a refrigerator works. So the key point is that this is an application of the following scientific principles of nature: When liquid evaporates it absorbs heat…
When we talk about refresh rate we are referring to the display itself (e.g. your TV, monitor or smartphone screen). When we talk about frame rate it is to do with the content as opposed to the display itself.
You can use JSON to represent just about any object. This is a form of abstraction. Of modeling the real world, which is a core concept in computing, which is really in large part about modeling the physical world into digital form. Think about anything you might use daily and they can be modeled (and probably have already been) in the digital world.
The page is dynamically generated “on the fly.” I didn’t get what this meant at first and it confused the heck out of me. But essentially I think what it means is the page doesn’t actually exist yet at this point. It is assembled right then and there on the spot via a PHP program, which is the programming language WordPress is written in