Concepts Definition and 403 Threads

Confused w/ some physics concepts! I don't know anything about guitars,...can someone please explain to me what is the different bet a acoustical guitar and an electric guitar (their amps, frequency...)? How amp play a role in an electric guitar?

Often times, the religiously drowned population, as well as just non-science people with honest intentions, like to use the word "theory" against a scientific concept. Let's face it, outside of the scientific community people know not a thing about science. To be widely considered a theory in...

What is so important about plank length i.e. why are seemingly unrelated things such as curled up dimensions and superstrings plank length?