Speed

In everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.

Like velocity, speed has the dimensions of a length divided by a time; the SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour. For air and marine travel the knot is commonly used.

The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in a vacuum c = 7008299792458000000♠299792458 metres per second (approximately 7008299722222222222♠1079000000 km/h or 7008299963840000000♠671000000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. In relativity physics, the concept of rapidity replaces the classical idea of speed.

Ami

AMI or Ami or AmI may refer to:

Organizations

Alessia Cara

Alessia Caracciolo (Italian pronunciation: [aˈlɛssja kaˈrattʃolo]; born July 11, 1996), better known as Alessia Cara, is a Canadian singer and songwriter. She is signed to EP Entertainment and Def Jam Recordings and is best known for "Here", her debut single from her debut album, Know-It-All, released November 13, 2015. A sleeper hit, the song reached the top 5 in the United States and the top 20 in Canada. Prior to her work with EP and Def Jam, Cara was known for her acoustic song covers on YouTube.

Early life

Alessia Caracciolo, known as Alessia Cara, was born in Brampton, Ontario, Canada, a city just outside Toronto, where she attended Cardinal Ambrozic Catholic Secondary School. She is of Italian descent from Calabria; her father was born in Canada, to Italian parents, and her mother is an Italian immigrant. As a child, she wrote poetry and did theatre. At the age of 10 she began playing guitar and taught herself how to play various songs. At the age of 13 she began her own YouTube channel where she posted covers of songs that she performed.

Chris Brown

Christopher Maurice "Chris" Brown (born May 5, 1989) is an American singer, dancer, rapper and actor. Born in Tappahannock, Virginia, he was involved in his church choir and several local talent shows from a young age. Having signed with Jive Records in 2004, Brown released his self-titled debut studio album the following year. It peaked at number two on the US Billboard 200 and was later certified double platinum by the Recording Industry Association of America (RIAA). With his first single "Run It!" peaking atop the US Billboard Hot 100, Brown became the first male artist as a lead since Diddy in 1997 to have his debut single top the chart. His second album Exclusive (2007) spawned his second Hot 100 number one "Kiss Kiss", in addition to "With You" and "Forever". The album was also certified double platinum by the RIAA.

In 2009, Brown received much media attention after pleading guilty to felony assault of his then girlfriend, singer Rihanna; he was sentenced to five years of probation and six months of community service. His third album Graffiti was released later that year, and included the top-twenty single "I Can Transform Ya". Brown's fourth album F.A.M.E. (2011) became his first to top the Billboard 200; it spawned the successful singles "Yeah 3x", "Look at Me Now", and "Beautiful People". F.A.M.E. earned Brown his first Grammy Award for Best R&B Album at the 54th Grammy Awards. His fifth album Fortune was released in 2012. However, after the release of Exclusive, Brown's albums have not been well received commercially or by music critics, with the exception of X, which received a normalized rating of 63. Brown's seventh studio album Royalty was released on December 18, 2015.

Amy Winehouse

Amy Jade Winehouse (14 September 1983 – 23 July 2011) was an English singer and songwriter known for her deep expressive contralto vocals and her eclectic mix of musical genres, including soul (sometimes labelled as blue-eyed soul and neo soul),rhythm and blues, and jazz. Winehouse's 2003 debut album, Frank, was a critical success in the UK and was nominated for the Mercury Prize. Her 2006 follow-up album, Back to Black, led to five 2008 Grammy Awards, tying the then record for the most wins by a female artist in a single night, and made her the first British female to win five Grammys, including three of the general field "Big Four" awards: Best New Artist, Record of the Year and Song of the Year.

Winehouse won three Ivor Novello Awards: in 2004, Best Contemporary Song for "Stronger Than Me"; in 2007, Best Contemporary Song again, this time for "Rehab"; and in 2008, Best Song Musically and Lyrically for "Love Is a Losing Game." She won the 2007 Brit Award for Best British Female Artist, having also been nominated for Best British Album, with Back to Black.