Wheel

A wheel is a circular component that is intended to rotate on an axle bearing. The wheel is one of the main components of the wheel and axle which is one of the six simple machines. Wheels, in conjunction with axles, allow heavy objects to be moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Wheels are also used for other purposes, such as a ship's wheel, steering wheel, potter's wheel and flywheel.

Common examples are found in transport applications. A wheel greatly reduces friction by facilitating motion by rolling together with the use of axles. In order for wheels to rotate, a moment needs to be applied to the wheel about its axis, either by way of gravity, or by the application of another external force or torque.

Etymology

The English word wheel comes from the Old English word hweol, hweogol, from Proto-Germanic *hwehwlan, *hwegwlan, from Proto-Indo-European *k^wek^wlo-, an extended form of the root *k^wel- "to revolve, move around". Cognates within Indo-European include Icelandic hjól "wheel, tyre", Greek κύκλος kúklos, and Sanskrit chakra, the latter both meaning "circle" or "wheel".

List of gear nomenclature

Addendum

The addendum is the height by which a tooth of a gear projects beyond (outside for external, or inside for internal) the standard pitch circle or pitch line; also, the radial distance between the pitch diameter and the outside diameter.

Addendum angle

Addendum angle in a bevel gear, is the angle between elements of the face cone and pitch cone.

Addendum circle

The addendum circle coincides with the tops of the teeth of a gear and is concentric with the standard (reference) pitch circle and radially distant from it by the amount of the addendum. For external gears, the addendum circle lies on the outside cylinder while on internal gears the addendum circle lies on the internal cylinder.

Pressure Angle

Apex to back

Apex to back, in a bevel gear or hypoid gear, is the distance in the direction of the axis from the apex of the pitch cone to a locating surface at the back of the blank.

Back angle

The back angle of a bevel gear is the angle between an element of the back cone and a plane of rotation, and usually is equal to the pitch angle.

Sex (film)

Sex is a 1920 American silent drama film directed by Fred Niblo, written by C. Gardner Sullivan, produced by J. Parker Read, and starring Louise Glaum. On its surface, the film was a morality story on the evils of marital infidelity. However, the film's producer, J. Parker Read, had made a series of pictures on sex themes. The release of Sex, with its provocative title and explicit scenes of seduction and debauchery, made it the subject of controversy among censors and commentators.

Plot

The film is a morality story on the evils of marital infidelity and the wild lifestyle of New York actors. At the same time, the film included scenes of seduction and debauchery that made it the subject of controversy over its prurient content.

The film's plot centers on Adrienne Renault (played by Louise Glaum), the beautiful queen of the Midnight Follies at the Frivolity Theater.

The film opens with Renault's current conquest, a married millionaire, Philip Overman (played by William Conklin). Overman is in his private box watching Renault perform her seductive "Spider Dance." Renault comes on stage dressed as a spider, "clad in a translucent cloak of webs wrapped cloak-like around a body-hugging black sheath."

Sex (I'm A...)

"Sex (I'm A...)" is a song by the American band Berlin from their second album Pleasure Victim. The song was co-written by group members John Crawford, Terri Nunn and David Diamond and sung as a duet by Crawford and Nunn.

Released as the album's second single in February 1983, the single became a cult hit on American radio and brought the group into the mainstream. Despite the significant attention, the song's racy lyrics resulted in it being banned from several radio stations. Perhaps because of this, the single ultimately peaked at No. 62 on the Billboard Hot 100 for two weeks in late March and early April 1983.The song was also the first single release from the band's new label, Geffen Records.

Cover versions

Canadian electroclash musician Peaches covered the song as a bonus track for her albums The Teaches of Peaches and Fatherfucker.

Canadian industrial musician Renee Cooper (aka Zombie Girl) covered the song for the bonus disc to her 2007 Blood, Brains and Rock 'N' Roll album.

Sexual intercourse

Sexual intercourse, or coitus or copulation, is principally the insertion and thrusting of the penis, usually when erect, into the vagina for sexual pleasure, reproduction, or both. This is also known as vaginal intercourse or vaginal sex. Other forms of penetrative sexual intercourse include anal sex (penetration of the anus by the penis), oral sex (penetration of the mouth by the penis or oral penetration of the female genitalia), fingering (sexual penetration by the fingers), and penetration by use of a dildo (especially a strap-on dildo). These activities involve physical intimacy between two or more individuals and are usually used among humans solely for physical or emotional pleasure and commonly contribute to human bonding.

A variety of views concern what constitutes sexual intercourse or other sexual activity, which can also impact views on sexual health. Although the term sexual intercourse, particularly the variant coitus, generally denotes penile-vaginal penetration and the possibility of creating offspring, it also commonly denotes penetrative oral sex and penile-anal sex, particularly the latter. It is usually defined by sexual penetration, while non-penetrative sex acts, such as non-penetrative forms of cunnilingus or mutual masturbation, have been termed outercourse. Non-penetrative sex acts, however, may additionally be considered sexual intercourse. The term sex, often a shorthand for sexual intercourse, can mean any form of sexual activity. Because people can be at risk of contracting sexually transmitted infections during sexual activities, though the transmission risk is significantly reduced during non-penetrative sex,safe sex practices are advised.