Rainbow
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
Rainbows can be full circles; however, the average observer sees only an arc formed by illuminated droplets above the ground, and centred on a line from the sun to the observer's eye.
In a primary rainbow, the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.
In a double rainbow, a second arc is seen outside the primary arc, and has the order of its colours reversed, with red on the inner side of the arc.
Overview
A rainbow is not located at a specific distance from the observer, but comes from an optical illusion caused by any water droplets viewed from a certain angle relative to a light source. Thus, a rainbow is not an object and cannot be physically approached. Indeed, it is impossible for an observer to see a rainbow from water droplets at any angle other than the customary one of 42 degrees from the direction opposite the light source. Even if an observer sees another observer who seems "under" or "at the end of" a rainbow, the second observer will see a different rainbow—farther off—at the same angle as seen by the first observer.
Rainbow (2005 film)
Rainbow (simplified Chinese: 我心飞翔; traditional Chinese: 我心飛翔; pinyin: Wǒ Xīn Fēi Xiáng; literally: "my heart is flying") is a 2005 Chinese film written and directed by Gao Xiaosong, starring Chen Daoming.
Cast
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Who You Are (Jessie J album)
Who You Are is the debut studio album by English singer-songwriter Jessie J, released on 28 February 2011. Due to high demand and interest from fans, the release advanced by a month from 28 March, as previously planned. Production for the album took place throughout 2010 and contributing producers included: Dr. Luke, Toby Gad and K-Gee.
Who You Are received generally mixed reviews from contemporary music critics. It débuted at number two on the UK Albums Chart selling 105,000 copies in its first week. The album débuted in the US at number 11 on the Billboard 200 with first-week sales of 34,000 copies. Two singles preceded the album: Jessie J's UK début single "Do It Like a Dude" and "Price Tag", featuring B.o.B which served as the US lead single. A third single, "Nobody's Perfect", became J's third consecutive top 10 hit in the UK. The fourth single from the album "Who's Laughing Now", released 21 August 2011, peaked at #16 on the UK Singles Chart. The title track, "Who You Are", was released on 13 November 2011 as the album's fifth UK single.
Work (thermodynamics)
In thermodynamics, work performed by a system is the energy transferred by the system to its surroundings, that is fully accounted for solely by macroscopic forces exerted on the system by factors external to it, that is to say, factors in its surroundings. Thermodynamic work is a version of the concept of work in physics.
The external factors may be electromagnetic, gravitational, or pressure/volume or other simply mechanical constraints. Thermodynamic work is defined to be measurable solely from knowledge of such external macroscopic forces. These forces are associated with macroscopic state variables of the system that always occur in conjugate pairs, for example pressure and volume, magnetic flux density and magnetization. In the SI system of measurement, work is measured in joules (symbol: J). The rate at which work is performed is power.
History
1824
Work, i.e. "weight lifted through a height", was originally defined in 1824 by Sadi Carnot in his famous paper Reflections on the Motive Power of Fire, he used the term motive power. Specifically, according to Carnot:
Work (film)
Work is a 1915 silent film starring Charlie Chaplin (his eighth film for Essanay Films), and co-starring Edna Purviance, Marta Golden and Charles Inslee. It was filmed at the Majestic Studio in Los Angeles.
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Work of art
A work of art, artwork, art piece, piece of art or art object is an aesthetic physical item or artistic creation. Apart from "work of art", which may be used of any work regarded as art in its widest sense, including works from literature and music, these terms apply principally to tangible, portable forms of visual art:
Used more broadly, the term is less commonly applied to:
