Young's modulus, also known as the tensile modulus, is a measure of the stiffness of an elastic material and is a quantity used to characterize materials. It is defined as the ratio of the uniaxial stress over the uniaxial strain in the range of stress in which Hooke's Law holds. In solid mechanics, the slope of the stress-strain curve at any point is called the tangent modulus. The tangent modulus of the initial, linear portion of a stress-strain curve is called Young's modulus. It can be experimentally determined from the slope of a stress-strain curve created during tensile tests conducted on a sample of the material. In anisotropic materials, Young's modulus may have different values depending on the direction of the applied force with respect to the material's structure.

It is also commonly called the elastic modulus or modulus of elasticity, because Young's modulus is the most common elastic modulus used, but there are other elastic moduli measured, too, such as the bulk modulus and the shear modulus.

Salesi Ma'afu, (born 22 March 1983 in Camperdown, Sydney, New South Wales) is an Australian professional Rugby union footballer. Ma'afu was selected to the Qantas Wallabies squad in 2009 and again in 2011 after having appeared for Australia A in 2007 and 2008. His younger brother, Campese Ma'afu plays for Fiji.

Ma'afu was educated at Granville and Ashfield Boys’ High Schools in Sydney and played rugby league as a youngster in the Balmain district before starting up with rugby, aged 11. Ma’afu first made his mark at representative level in the NSW Under-19 side in 2001 and 2002, later featuring in the Waratahs Academy through 2004 and 2005. In 2006, he was signed by the ACT Brumbies, making his Super Rugby debut a year later. Ma'afu made the Australia A squad the same year, ending his year with a late-season appearance for the British Barbarians club during its 22-5 win over the new Rugby World Cup holders, South Africa. In the NSW club competition, after spending two years with Warringah, in 2009 Ma'afu returned to West Harbour, where he plays alongside his brother, Campese.

Thomas Nicholas Youngs (born 28 January 1987, Norwich, England) is a rugby union player for Leicester Tigers in the Aviva Premiership. He has also played on loan at Bedford Blues and Nottingham.

Youngs is the son of former Leicester and England scrum-half Nick Youngs, and the elder brother of current Leicester and England scrum-half Ben Youngs.

Originally a centre he changed to play at hooker after advice from then Tigers coach Heyneke Meyer.

Youngs played for Gresham's School and for England Schools, and also for Holt as a junior. He made his Tigers debut against London Irish on Boxing Day 2006, broke his leg after five minutes and came off after thirteen.

In 2007-08, he was a member of the England squad at Rugby sevens.

In the 2008/09 season, Tom has been used in the Leicester "A" team as a hooker, where he is trained by head coach and former hooker Richard Cockerill.

Jenny Owen Youngs (born November 22, 1981) is an American singer-songwriter from Montclair, New Jersey.

Youngs played the flute in elementary school and the tuba in junior high school. At 14, she began to play the guitar. She graduated from State University of New York at Purchase with a degree in studio composition.

Her album Batten the Hatches was self-released in 2005. In 2006, a song from that album, "Fuck Was I", appeared in the second season premiere of Showtime's Weeds, resulting in Batten the Hatches being re-released on April 10, 2007 with new artwork and an extra track ("Drinking Song") on the Canadian indie label Nettwerk. "Fuck Was I" was also released on Weeds: Music from the Original Series, Vol. 2.

In addition to her solo career, she is in the band The Robot Explosion, a side project with fellow musicians and friends Bess Rogers, Andrew Futral, and Saul Simon-MacWilliams. She also takes part in an online Podcast through Myspace with Bess Rogers and Andrew Futral, titled 'Once More With Feeling' (named after the musical episode of Buffy The Vampire Slayer).

Xavier Henry (born March 15, 1991) is an American professional basketball shooting guard who plays for the New Orleans Hornets of the National Basketball Association (NBA). Henry, who is from Oklahoma City, Oklahoma, played one year of college basketball with the Kansas Jayhawks before he was drafted in the 2010 NBA Draft by the Memphis Grizzlies.

Xavier Henry was born in Ghent, Belgium, where his father played professional basketball in the early 1990s.

Henry's brother, C. J., was a 2005 MLB draft first round pick and returned to college after playing three years of minor-league baseball in the New York Yankees and Philadelphia Phillies' organizations. The brothers' father, Carl, played basketball at Kansas in the 1980s and their mother played basketball for the Kansas women's team.

Henry was named to the 2009 McDonald's All-American Team where he scored 14 points. Henry was also selected to play in the 2009 Nike Hoop Summit at the Rose Garden in Portland where he led Team USA with 22 points including six 3 pointers and the Jordan Brand Classic at Madison Square Garden where he scored 10 points for the white team. He was SLAM Magazine's high school diary keeper for the 2008–09 basketball season. On March 14, 2009, he led Putnam City High School to the Oklahoma Class 6A state championship, scoring 24 points in the title game against Jenks High School.