What is a projecting support on a wall called, whether or not it's "flying"?

Which professor urged a generation in 1967 to "Turn on, tune in, drop out"? A professor's 2007 talk at Carnegie Mellon on achieving childhood dreams inspired millions under which title? Which film director was born in Britain in 1899 and died in Los Angeles in 1980? A progressive tax is one whose rate rises as what rises? A prolific warrior and builder, which pharaoh ruled Egypt for about 66 years in the 13th century B.C.? A promotional pianist for the piano maker Erard, which Hungarian wrote "A Faust Symphony" in 1857? What stand does an artist use to hold a canvas? A prosthesis is an artificial replacement for which kind of body part, such as an arm or leg?