A landslide is a geological phenomenon which includes a wide range of ground movement, such as rock falls, deep failure of slopes and shallow debris flows, which can occur in offshore, coastal and onshore environments. Although the action of gravity is the primary driving force for a landslide to occur, there are other contributing factors affecting the original slope stability. Typically, pre-conditional factors build up specific sub-surface conditions that make the area/slope prone to failure, whereas the actual landslide often requires a trigger before being released.
A slide projector is an opto-mechanical device to view photographic slides. It has four main elements: a fan-cooled electric light bulb or other light source, a reflector and "condensing" lens to direct the light to the slide, a holder for the slide and a focusing lens. A flat piece of heat absorbing glass is often placed in the light path between the condensing lens and the slide, to avoid damaging the latter. This glass transmits visible wavelengths but absorbs infrared. Light passes through the transparent slide and lens, and the resulting image is enlarged and projected onto a perpendicular flat screen so the audience can view its reflection. Alternatively the image may be projected onto a translucent "rear projection" screen, often used for continuous automatic display for close viewing. This form of projection also avoids the audience's interrupting the light stream or bumping into the projector.
Slide projectors were common in the 1950s and 1960s as a form of entertainment; family members and friends would gather to view slideshows.
In-home photographic slides and slide projectors have largely been replaced by low cost paper prints, digital cameras, DVD media, video display monitors and digital projectors.
As of October 2004, Kodak no longer manufactures slide projectors. It is also increasingly difficult in some countries to locate photo processors who will process slide film.
"Slide" is a song by The Goo Goo Dolls. It was the first commercial single release from their sixth studio album, Dizzy Up the Girl. Speculation as to the song's meaning has persisted for quite some time blank">http://www.songmeanings.net/lyric.php?lid=1235&offset=0&page=1#comments, but Rzeznik himself, in a 2002 performance on _VH1 Storytellers, has stated definitively that the song refers to a teenage girl in a Catholic environment who has become pregnant. She and her boyfriend are debating as to the possibility of abortion or marriage.
It hit #1 on Billboard's Adult Top 40 chart on March 3 1999, #1 on Billboard's Modern Rock Tracks chart on October 31, 1998, and #8 on the Hot 100 Singles Chart on January 5 1999.
This release also includes the song "Acoustic #3" and the B-side "Nothing Can Change You."
