Soil mechanics is a branch of engineering mechanics that describes the behavior of soils. It differs from fluid mechanics and solid mechanics in the sense that soils consist of a heterogeneous mixture of fluids (usually air and water) and particles (usually clay, silt, sand, and gravel) but soil may also contain organic solids, liquids, and gasses and other matter. Along with rock mechanics, soil mechanics provides the theoretical basis for analysis in geotechnical engineering, a subdiscipline of Civil engineering. Soil mechanics is used to analyze the deformations of and flow of fluids within natural and man-made structures that are supported on or made of soil, or structures that are buried in soils. Examples applications are building and bridge foundations, retaining walls, dams, and buried pipeline systems. Principles of soil mechanics are also used in related disciplines such as geophysical engineering, coastal engineering, agricultural engineering, hydrology and soil physics.

This article describes the genesis and composition of soil, the distinction between pore water pressure and inter-granular effective stress, capillary action of fluids in the pore spaces, soil classification, seepage and permeability, time dependent change of volume due to squeezing water out of tiny pore spaces, also known as consolidation, shear strength and stiffness of soils. The shear strength of soils is primarily derived from friction between the particles and interlocking, which are very sensitive to the effective stress. The article concludes with some examples of applications of the principles of soil mechanics such as slope stability, lateral earth pressure on retaining walls, and bearing capacity of foundations.

Aaron Dontez Yates (born November 8, 1971), better known by his stage name Tech N9ne (pronounced "Tech Nine"), is an American rapper from Kansas City, Missouri. In 1999, Yates and Travis O'Guin founded the record label Strange Music. Throughout his career, Yates has sold over one million albums and has had his music featured in film, television, and video games. In 2009, he won the Left Field Woodie award at the mtvU Woodie Awards.

His stage name originated from the TEC-9 semi-automatic handgun, given to him by rapper Black Walt due to his fast rhyming style. Yates later applied a deeper meaning to the name, claiming that it stands for the complete technique of rhyme, with 'tech' meaning technique and 'nine' representing the number of completion.

Aaron Dontez Yates was born on November 8, 1971 in Kansas City, Missouri. He began rapping at a very early age, and would rap the letters of his name in order to remember how to spell it. He never met his father, and his mother suffered from epilepsy and lupus when he was a child, which emotionally affected him and inspired him to "search for God." He would wander around abandoned buildings with his best friend, Brian Dennis, hoping to catch a ghost on film. In 2003, Dennis was shot and killed by his girlfriend's ex-boyfriend, which further inspired Yates' search for a higher power, as well as giving him the drive to vent his frustrations in his music.

Samuel William Christopher Watson (born March 7, 1974 in Kansas City, Missouri) better known by his stage name Krizz Kaliko, is an American rapper and singer. He is a long time collaborator with fellow hometown native, Tech N9ne, and is signed to the label that Tech co-owns, Strange Music.

Krizz Kaliko began his musical career in the late 1990s when he began working with a local producer by the name of IcyRoc Kraven. Another local rapper by the name of Tech N9ne was also collaborating with IcyRoc at the time, which led to the two rappers meeting. Tech N9ne was currently working on a song titled "Who You Came To See" and Krizz made a comment that the song could have a better hook. Tech offered up the opportunity to prove his case, and Tech was blown away when Kaliko proved just that. Tech would bring Kaliko into his "inner circle" which would eventually result in Kaliko signing to the label co-owned by his new found friend.

Since then, Kaliko has often contributed to albums put out by Tech N9ne, be it being featured as a rapper or simply providing background vocals for the tracks on the album. Although the largest portion of his work is that of his collaborations with Tech, he has also performed similar tasks for fellow labelmates Kutt Calhoun, Skatterman & Snug Brim, and Prozak. Other collaborations include tracks with the Kottonmouth Kings, Potluck, E-40, T-Pain and Twiztid.