There isn't really a specific word for it, beyond saying it's an instrumental. In Classical Music, instrumental music tends to be called by its tempo, such as Adagio or Lento, but popular music doesn't have that convention.
slow music
Types of music can motivate you differently. Christmas music can put you in happy mood. Rock can...make you yell. But singing motivates you because it can be soothing or powerful. Sometimes slow, sad songs make you depressed. It spends on the type of music you listen to.
It is classical and it is music that tells a story through the actors singing instead of dialog.
Practice, practice, practice. If you can't get your notes right, try playing a scale! If you know your music notes but you can't play it fast/slow enough, play it slow and go a little faster each time if you get it right. Do that and you'll be playing that piece of music in no time!
To improve rhythm and timing in music, practice with a metronome to help you stay on beat. Start slow and gradually increase the tempo as you get more comfortable. Focus on listening to the beat and syncing your playing or singing with it. Consistent practice and patience are key to developing a strong sense of rhythm and timing in music.
There are many singers famous for singing slow songs. Mariah Carey and Celine Dion have had many successful slow songs and Whitney Houston had some very successful slow songs.
The genre of music for the slow metal is basically called the slow metal.
slow
You may be thinking of the Scientist by Coldplay, but i'm not 100% sure
Make Her Say by Kid Cudi f/ Kanye West and Common
Tempo is how fast of slow something is played this can be for a peice of music to get effect they play the music fast and slow.
rallentando or rall. for short indicates that you have to slow down in the musical piece that you are performing or playing. by shad Rall. means to gradually slow down.