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.
1 One cup (150 grams) of cubed jicama contains 45 calories and a large amount of Vitamin C.  Unlike potatoes, jicama does not turn brown when exposed to the air. For this reason, it is a staple in vegetable platters. It is also used in stir-fry because it tends to adopt the flavors of the ingredients around it.