I don’t remember if they had to always make sure that books, pencils, glasses containing beverages, etc. were tied down.
To me the most unbelievable thing scientifically was the transporter. It seems to me if they could unscramble you into atoms then reassemble them, then they could make just about anything with the same technology.
I suppose a case could be made that magnetism is Love. The Bible says “God is love” and I think God is what holds the universe together.
When they teleported to other ships, even old, dead derelicts, they never seemed to lack gravity.