- published: 09 Dec 2015
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A gear is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque. Two or more gears working in tandem are called a transmission and can produce a mechanical advantage through a gear ratio and thus may be considered a simple machine. Geared devices can change the speed, torque, and direction of a power source. The most common situation is for a gear to mesh with another gear, however a gear can also mesh a non-rotating toothed part, called a rack, thereby producing translation instead of rotation.
The gears in a transmission are analogous to the wheels in a pulley. An advantage of gears is that the teeth of a gear prevent slipping.
When two gears of unequal number of teeth are combined a mechanical advantage is produced, with both the rotational speeds and the torques of the two gears differing in a simple relationship.
In transmissions which offer multiple gear ratios, such as bicycles and cars, the term gear, as in first gear, refers to a gear ratio rather than an actual physical gear. The term is used to describe similar devices even when gear ratio is continuous rather than discrete, or when the device does not actually contain any gears, as in a continuously variable transmission.
Cuando no consigas alguien con quien recordar y nadie nada sonrrie al pasar y de lejos y piensan en mi bajito nombrame y asi tu voz me llevara donde estes donde estes tu llamame y en tu vuelo ahí estare sere la parte que te falta del aire haga frio lluvia o calor cada vez que quiera yo estare donde tu estes
Si las tardes rompe la noche de un volver a ti y el viento del norte lo despedi parate de cara y gritale y veraz mis brazos detrás de el hay donde estes tu llamame amor y en tu vuelo mi corazon sere la parte q te falte del aire haga frio lluvio o calor cada vez q quieras yo estare tu sabes que hay un mismo cielo para los dos que somos la canción que somos nos queremos que somos clon del futuro que es lo mismo corazon hay donde estes tu llamame y en tu sueño ahí estare sere la parte que te falte del aire haga frio lluvio o calor cada vez que quiera yo estare donde tu estes