Turntable speed / pitch / RPM. Vinyl records are manufactured to be played back at a certain speed. Most 12 inch (diameter) long-play records are played back at 33 1/3rd revolutions per minute. Most 7 inch records require 45 RPM.
Jicama is a large, bulbous root vegetable. A bulb may weigh one or two pounds and has a rough 'n' tough brown skin which should be peeled before eating or cooking.
With a sharp knife, trim a slice off the top and another off the bottom. These create a flat surface, making it a safe and sturdy vegetable to continue cutting. Work the knife around the jicama, cutting off wide swaths, first working from the top, then turning over and doing the other side. Now, the choice is yours. Dice the jicama, cut it into batons for a vegetable tray -- or grate it for coleslaw, say. It grates easily with a box grater, no need for a food processor except maybe for big batches.