Dell XPS 13 Ultrabook Review. Dell's XPS 13 Ultrabook starts at $999. So you have a MacBook Air, a man sitting next to me on a flight from New York to San Francisco says to me as he gestures at the laptop stuffed in my seat pocket.
In rear-wheel drive automobiles the central drive shaft (or prop shaft) engages the differential through a hypoid gear(ring and pinion). The ring gear is mounted on the carrier of the planetary chain that forms the differential. This hypoid gear is a bevel gear that changes the direction of the drive rotation.
7. differential gear. 8. Math. a. a function of two variables that is obtained from a given function, y = f(x), and that expresses the approximate increment in the given function as the derivative of the function times the increment in the independent variable, written as dy = f~(x) dx. b. any generalization of this function to higher dimensions.