Radio

Radio is the use of radio waves is to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.

Radio systems need a transmitter to modulate (change) some property of the energy produced to impress a signal on it, for example using amplitude modulation or angle modulation (which can be frequency modulation or phase modulation). Radio systems also need an antenna to convert electric currents into radio waves, and vice versa. An antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual stations to be selected. The electromagnetic wave is intercepted by a tuned receiving antenna. A radio receiver receives its input from an antenna and converts it into a form usable for the consumer, such as sound, pictures, digital data, measurement values, navigational positions, etc. Radio frequencies occupy the range from a 3 kHz to 300 GHz, although commercially important uses of radio use only a small part of this spectrum.

Memphis, Tennessee

Memphis is a city in the southwestern corner of the U.S. state of Tennessee and the county seat of Shelby County. The city is located on the fourth Chickasaw Bluff, south of the confluence of the Wolf and Mississippi rivers.

Memphis had a population of 653,450 in 2013, making it the largest city in the state of Tennessee, the largest city on the Mississippi River, the third largest in the greater Southeastern United States, and the 23rd largest in the United States.

The greater Memphis metropolitan area, including adjacent counties in Mississippi and Arkansas, had a 2014 population of 1,317,314. This makes Memphis the second-largest metropolitan area in Tennessee, surpassed by metropolitan Nashville.

Memphis is the youngest of Tennessee's major cities, founded in 1819 as a planned city by a group of wealthy Americans including judge John Overton and future president Andrew Jackson. A resident of Memphis is referred to as a Memphian, and the Memphis region is known, particularly to media outlets, as "Memphis & the Mid-South".

Flat Earth

The flat Earth model is an archaic conception of the Earth's shape as a plane or disk. Many ancient cultures subscribed to a flat Earth cosmography, including Greece until the classical period, the Bronze Age and Iron Age civilizations of the Near East until the Hellenistic period, India until the Gupta period (early centuries AD) and China until the 17th century. That paradigm was also typically held in the aboriginal cultures of the Americas, and the notion of a flat Earth domed by the firmament in the shape of an inverted bowl was common in pre-scientific societies.

The idea of a spherical Earth appeared in Greek philosophy with Pythagoras (6th century BC), although most Pre-Socratics retained the flat Earth model. Aristotle accepted the spherical shape of the Earth on empirical grounds around 330 BC, and knowledge of the spherical Earth gradually began to spread beyond the Hellenistic world from then on.

Historical development

Ancient Near East

In early Egyptian and Mesopotamian thought the world was portrayed as a flat disk floating in the ocean. A similar model is found in the Homeric account of the 8th century BC in which "Okeanos, the personified body of water surrounding the circular surface of the Earth, is the begetter of all life and possibly of all gods." The Israelites likely had a similar cosmology, with the earth as a flat disc floating on water beneath an arced firmament separating it from the heavens.

Memphis Depay

Memphis Depay (Dutch pronunciation: [ˈmɛmfɪs dəˈpɑi]; born 13 February 1994), also known simply as Memphis, is a Dutch professional footballer who plays as a winger for English club Manchester United and the Netherlands national team. Depay was named as the "Best Young Player" in the world in 2015 by France Football. Depay has been dubbed "New Ronaldo", due to similarities in playing style with the Portuguese counterpart.

He began his professional career with PSV Eindhoven, and under the influence of manager Phillip Cocu, he became an integral part of the team scoring 50 goals in 124 games across all competitions. During the 2014–15 season, he was the top scorer of the league with 22 goals in 30 games, and helped the team win the Eredivisie title, for the first time since 2008. He was also awarded the Johan Cruyff Trophy for his performances during the season. He joined Manchester United in May 2015 for a reported fee of £25 million.

Depay was part of the Netherlands Under-17 team who won the 2011 European Championship. He made his senior debut in 2013, and the following year was part of their squad who came third at the 2014 FIFA World Cup.

Adam

Adam (Hebrew: אָדָם‎; Aramaic/Syriac: ܐܕܡ; Arabic: آدم‎) is a figure from the Book of Genesis who is also mentioned in the New Testament, the deuterocanonical books, the Quran, the Book of Mormon, and the Book of Iqan. According to the creation myth of the Abrahamic religions, he was the first human.

In the Genesis creation narratives, he was created by Yahweh-Elohim ("Yahweh-God", the god of Israel), though the term "adam" can refer to both the first individual person, as well as to the general creation of humankind. Christian churches differ on how they view Adam's subsequent behavior of disobeying God (often called the Fall of man), and to the consequences that those actions had on the rest of humanity. Christian and Jewish teachings sometimes hold Adam and Eve (the first woman) to a different level of responsibility for the Fall, though Islamic teaching holds both equally responsible. In addition, Islam holds that Adam was eventually forgiven, while Christianity holds that redemption occurred only later through the sacrifice of Jesus Christ. The Bahá'í Faith, Islam and some Christian denominations consider Adam to be the first prophet.