useless trivia: What Word Means: A Sixth Hour Service?

Questions

Music - Who advised us to 'break on through to the other side'?

Music - Who appeared solo at the Woodstock festival after leaving 'The Lovin' Spoonful'?

Music - Who began his career with 'The Yardbirds' and established himself as one of the best rock guitarists of his generation?

Music - Who began his professional career with Black Sabbath?

Music - Who collaborated with John Lennon on 'Whatever Gets You Through The Night'?