Radio is the transmission of signals through free space by electromagnetic waves with frequencies significantly below visible light, in the radio frequency range, from about 3 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.

Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, 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.

The etymology of "radio" or "radiotelegraphy" reveals that it was called "wireless telegraphy," which was shortened to "wireless" in Britain. The prefix radio- in the sense of wireless transmission, was first recorded in the word radioconductor, a description provided by the French physicist Édouard Branly in 1897. It is based on the verb to radiate (in Latin "radius" means "spoke of a wheel, beam of light, ray").

A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun, also known as daytime. The period of time measured from local noon to the following local noon is called a solar day.

Several definitions of this universal human concept are used according to context, need and convenience. In 1967, the second was redefined in terms of the wavelength of light, and it became the SI base unit of time. The unit of measurement for time called "day", redefined in 1967 as 86,400 SI seconds and symbolized d, is not an SI unit, but it is accepted for use with SI. A civil day is usually also 86,400 seconds, plus or minus a possible leap second in Coordinated Universal Time UTC, and, in some locations, occasionally plus or minus an hour when changing from or to daylight saving time. The word day may also refer to a day of the week or to a calendar date, as in answer to the question "On which day?" Day also refers to the part of the day that is not night — also known as 'daytime'. The life patterns of humans and many other species are related to Earth's solar day and the cycle of day and night (see circadian rhythms).

Nelly Kim Furtado (born December 2, 1978) is a Canadian singer-songwriter, record producer and actress. Furtado first gained fame with her debut album, Whoa, Nelly!, and its single "I'm Like a Bird", which won a 2001 Juno Award for Single of the Year and a 2002 Grammy Award for Best Female Pop Vocal Performance. Her second studio album, Folklore, was released. It was less commercially successful in the US but produced three international singles: "Powerless (Say What You Want)", "Try", and "Força" (the theme of the 2004 European Football Championship). Her third studio album, Loose was her biggest success worldwide. It produced the number-one hits "Promiscuous", "Maneater", "Say It Right" and "All Good Things (Come to an End)". After a three-year break, she released her first full-length Spanish album, Mi Plan. For Mi Plan, Furtado received the Latin Grammy for Best Female Pop Vocal Album. Furtado's fourth English-language studio album, The Spirit Indestructible, is set for release on September 18, 2012.