Not exactly, they are search engines in their own right that have their own crawlers, but also use the Bing API. Leta is literally a proxy, it searches on the google (or brave) search website on your behalf and serves you the results. That way the only data Google gets is Mullvad’s.

I think that would be Qwant. This is a search engine proxy.

And you can quote something without embedding it.

You can also self-host bitwarden.

They’re different things. The OP means electromagnetism, Coulomb’s law has nothing to do with quantum mechanics, it’s classical physics.

The relation between them is that they’re both forces that scale with the inverse square of the distance between the objects. Any force that scales with the inverse square of distance has pretty much the same general form.

Another similarity is that both are incomplete, first approximations that describe their respective forces. The more complete versions are Maxwell’s laws for electromagnetism and General Relativity for gravity.

It’s electromagnetism you mean, not quantum mechanics.