Wave

In physics, a wave is an oscillation accompanied by a transfer of energy that travels through space or mass. Frequency refers to the addition of time. Wave motion transfers energy from one point to another, which displace particles of the transmission medium—that is, with little or no associated mass transport. Waves consist, instead, of oscillations or vibrations (of a physical quantity), around almost fixed locations.

There are two main types of waves. Mechanical waves propagate through a medium, and the substance of this medium is deformed. The deformation reverses itself owing to restoring forces resulting from its deformation. For example, sound waves propagate via air molecules colliding with their neighbors. When air molecules collide, they also bounce away from each other (a restoring force). This keeps the molecules from continuing to travel in the direction of the wave.

The second main type of wave, electromagnetic waves, do not require a medium. Instead, they consist of periodic oscillations of electrical and magnetic fields originally generated by charged particles, and can therefore travel through a vacuum. These types of waves vary in wavelength, and include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Call

Call may refer to:

In arts and entertainment

In science and technology

Computing

Telecommunications

Other uses in science and technology

In finance

Switch

In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another. The mechanism of a switch may be operated directly by a human operator to control a circuit (for example, a light switch or a keyboard button), may be operated by a moving object such as a door-operated switch, or may be operated by some sensing element for pressure, temperature or flow. A relay is a switch that is operated by electricity. Switches are made to handle a wide range of voltages and currents; very large switches may be used to isolate high-voltage circuits in electrical substations.

Description

The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts, which are connected to external circuits. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting. The mechanism actuating the transition between these two states (open or closed) can be either a "toggle" (flip switch for continuous "on" or "off") or "momentary" (push-for "on" or push-for "off") type.

The Switch

The Switch may refer to:

See also

Resident Evil

Resident Evil, known as Biohazard (バイオハザード, Baiohazādo) in Japan, is an action, adventure, horror fiction video game based media franchise created by Shinji Mikami and owned by the video game company Capcom. The franchise focuses around a series of survival horror video games, but has since branched out into comic books, novels and novelizations, sound dramas, a series of live-action films and animated sequels to the games, and a variety of associated merchandise, such as action figures. The overarching plot of the series focuses on multiple characters and their roles in recurring outbreaks of zombies and other monsters, initially due to the release of the T-virus, a biological weapon created by the fictional Umbrella Corporation.

The eponymous first game in the series was released in 1996 as a survival horror video game, but the franchise has since grown to encompass other video game genres. The series is a mix of action and horror film-inspired plotlines, exploration and puzzle solving, but from Resident Evil 4 onwards, the main series took a more third-person shooter approach with fewer puzzles and greater emphasis on gunplay and weapons upgrading. As of 2015, the video game series has sold 61 million units worldwide. It has become Capcom's biggest franchise in terms of sales and marked the start of the "survival horror" genre, which was already influenced by earlier efforts such as Sweet Home (also by Capcom) and the Alone in the Dark series.