The opening date for Cats in London was May 11, 1981 and the opening date for the show in New York Was October 7,1982.
This is generally called a jukebox musical.
There really is no technical name for someone who impersonates musical instruments and machines. They would simply be called an impersonator of musical instruments and machines.
A numbered musical piece might be called a concerto, an opus, or a composition. It could also be called a symphony.
It is known as an Octave (a musical scale of eight notes).
The musical opening is called an overture. It starts with the letter O.
overture
the opening
opening it
musicalS are called musicalS because they have MUSIC in them making them MUSICAL
A musical foot is called a "spondee"
The opening date for Cats in London was May 11, 1981 and the opening date for the show in New York Was October 7,1982.
"What Time is it" is the opening song in High School Musical 2.
Musical Soul
because it has an opening on one of its angles
Food, Glorious Food is the opening song from the Broadway musical Oliver!. There is also a British cooking television show called Food Glorious Food.
A short musical idea can be called a number of things. It can be called a phrase or motif for example.