# watt

City of license WATT Cadillac, Michigan [1] NewsTalk 1240 1945 1240 kHz News-Talk-Sports 1,000 watts C MacDonald Garber Broadcasting WATT, WKAD, WKHQ-FM, WLXT, WLXV, WMKT, WMBN http://www.watt1240.com/

## Sources

The watt (symbol: W) is the SI derived unit of power, equal to one joule of energy per second. A human climbing a flight of stairs is doing work at the rate of about 200 watts. A first class athlete can work at 375 watts for 30 minutes before exhaustion.[1] An automobile engine produces mechanical energy at a rate of 25,000 watts (approximately 30 horsepower) while cruising. A typical household incandescent light bulb uses electrical energy at a rate of 40 to 100 watts, while the energy-saving compact fluorescent lights which are replacing them use 8 to 20 watts to yield the same light output.

## Definition

One watt is one joule (the SI unit of energy) per second, that is 1 newton metre per second. It may be visualized simply as the amount of energy expended by a single candle.

In electrical terms, it follows that:

That is, if 1 volt of potential difference is applied to a resistive load, and a current of 1 ampere flows, then 1 watt of power is dissipated.[2]

## Origin and adoption as an SI unit

The watt is named after James Watt for his contributions to the development of the steam engine, and was adopted by the Second Congress of the British Association for the Advancement of Science in 1889 and by the 11th General Conference on Weights and Measures in 1960 as the unit of power incorporated in the International System of Units (or "SI").
 This SI unit is named after James Watt. As for all SI units whose names are derived from the proper name of a person, the first letter of its symbol is uppercase (W). But when an SI unit is spelled out, it should always be written in lowercase (watt), unless it begins a sentence or is the name "degree Celsius". — Based on The International System of Units, section 5.2.

### SI multiples

Multiple Name Symbol Multiple Name Symbol
100wattW
101decawattdaW10–1deciwattdW
102hectowatthW10–2centiwattcW
103kilowattkW10–3milliwattmW
106megawattMW10–6microwattW
109gigawattGW10–9nanowattnW
1012terawattTW10–12picowattpW
1015petawattPW10–15femtowattfW
1018exawattEW10–18attowattaW
1021zettawattZW10–21zeptowattzW
1024yottawattYW10–24yoctowattyW

## Derived and qualified units for power distribution

### Kilowatt

The kilowatt (symbol: kW), equal to one thousand watts, is typically used to state the power output of engines and the power consumption of tools and machines. A kilowatt is roughly equivalent to 1.34 horsepower.

### Megawatt

The megawatt (symbol: MW) is equal to one million (106) watts.

Many things can sustain the transfer or consumption of energy on this scale; some of these events or entities include: lightning strikes, large electric motors, naval craft (such as aircraft carriers and submarines), engineering hardware, and some scientific research equipment (such as the supercollider and large lasers). A large residential or retail building may consume several megawatts in electric power and heating energy.

The productive capacity of electrical generators operated by utility companies is often measured in MW. Modern high-powered diesel-electric railroad locomotives typically have a peak power output of (3 to 5) MW, whereas a typical modern nuclear power plant produces a peak output on the order of 500 to 2000 MW.

According to the Oxford English Dictionary, the earliest citing for "megawatt" is a reference in the 1900 Webster's International Dictionary of English Language. The OED also says "megawatt" appeared in a 28 November, 1847, article in Science (506:2).

### Watts electrical and thermal

Watt electrical (abbreviation: We) is a term that refers to power produced as electricity, while Watt thermal (abbreviation: Wt or Wth) refers to thermal power produced. These terms and abbreviations are not SI units, but they are used with the same prefixes as SI, for example megawatt electrical (MWe), gigawatt electrical (GWe), megawatt thermal (MWt) and gigawatt thermal (GWt). These terms are used by engineers to disambiguate the electric output of a thermal power station versus the (larger) thermal output. For example, the Embalse nuclear power plant in Argentina uses a fission reactor to generate 2109 MWt of heat, which creates steam to drive a turbine, which generates 648 MWe of electricity. The difference is heat lost to the surroundings.

## Confusion of watts and watt-hours

Power and energy are frequently confused in the general media, for instance when a device is said to be rated at "100 watts per hour", which does not make any sense since a watt is a rate of doing work or using energy of 1 joule of energy per second. As a rate itself, a watt does not need to be followed by a time designation, unless one is talking about a change in power over time, analogous to an acceleration or deceleration.

Because a joule as a quantity of energy does not have a readily imagined size to the layperson, the non-SI unit watt-hour, or rather its multiple the kilowatt-hour, is frequently used as a unit of energy, especially by energy-supply companies (electricity and natural gas suppliers) which often quote charges by the kilowatt-hour. A kilowatt-hour is the amount of energy equivalent to a power of 1 kilowatt running for 1 hour (3.6 MJ).

## References

1. ^ Douglas Malewicki, (1983), International Human Powered Vehicle Association Scientific Symposium, human power-output graph (about half-way down the page, see data point at 0.5 hours and 0.5 hp which equals 375 watts at a conversion of 750 watts per hp), accessed 2007-09-03.
2. ^ Amps, Volts, Watts, Ohms. Retrieved on 2007-04-17.

Nickname: City on the Lakes
Coordinates:
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State Michigan
County Wexford

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FreQuency is a music video game developed by Harmonix and published by SCEI. It was released in November 2001. A sequel, titled Amplitude was released in 2003.
hertz (symbol: Hz) is the SI unit of frequency. Its base unit is cycle/s or s-1 (also called inverse seconds, reciprocal seconds). In English, hertz is used as both singular and plural.
A radio format or programming format describes the overall content broadcast on a radio station. Radio formats are frequently employed as a marketing tool, and constantly evolve.
NewsRadio is an American sitcom, originally broadcast from 1995 to 1999 on NBC. The show was created by executive producer Paul Simms.

## Overview

The series is set at WNYX, a fictional news radio station in New York City populated by an eccentric station owner and
• Talk Radio UK, a former national UK talk station which is to be relaunched the new digital radio licence by the 4 Digital Group.

Sports radio (or sports talk radio) is a radio format devoted entirely to discussion and broadcasting of sporting events. A popular format with an almost exclusively male demographic in most areas, sports radio is characterized by an often-boisterous on-air style and
Nominal power is a measurement of a mediumwave radio station's output used in the United States. AM broadcasters are licensed by the Federal Communications Commission to operate at a specific nominal power, which may be (and usually is) different from the transmitter power output.
This is a list of broadcast station classes applicable in much of North America under international agreements between the United States, Canada and Mexico. Effective radiated power (ERP) and height above average terrain (HAAT) are listed unless otherwise noted.
In broadcasting, sister stations or sister channels (or "sibling stations" in gender-neutral form) are radio and/or television stations operated by the same ownership.

First air date January 2003
Frequency 93.7 MHz
Format Oldies
Power 4,300 watts
Class A
WKHQ-FM

Branding 106 KHQ
Slogan Today's Hit Music
First air date May 8, 1980
Frequency 105.
WLXT

Branding Lite 96 FM
Slogan Northern Michigan's At Work Radio Station
Frequency 96.
WLXV

Branding Mix 96
Slogan The Best Music of the 80's, 90's, and Today
Frequency 96.
WMKT

[2] (Nighttime)
Branding WMKT 1270 The Talk Station
Slogan 200 Miles of Talk
Frequency 1270 kHz
Format Talk
Power 27,000 watts (Daytime)
WMBN

Branding 1340 AM WMBN, Michigan's Beautiful North
Slogan America's Best Music
First air date April 30, 1947
Frequency 1340 kHz
Power 1,000 watts

A website (alternatively, Web site or web site) is a collection of Web pages, images, videos or other digital assets that is hosted on one or several Web server(s), usually accessible via the Internet, cell phone or a LAN.
worldwide view of the subject.
NewsRadio is an American sitcom, originally broadcast from 1995 to 1999 on NBC. The show was created by executive producer Paul Simms.

## Overview

The series is set at WNYX, a fictional news radio station in New York City populated by an eccentric station owner and
• Talk Radio UK, a former national UK talk station which is to be relaunched the new digital radio licence by the 4 Digital Group.

Sports radio (or sports talk radio) is a radio format devoted entirely to discussion and broadcasting of sporting events. A popular format with an almost exclusively male demographic in most areas, sports radio is characterized by an often-boisterous on-air style and

Nickname: City on the Lakes
Coordinates:
Country United States
State Michigan
County Wexford

19th century - 20th century - 21st century
1910s  1920s  1930s  - 1940s -  1950s  1960s  1970s
1940 1941 1942 - 1943 - 1944 1945 1946

Year 1945 (MCMXLV
Si, si, or SI may refer to (all SI unless otherwise stated):

In language:
• One of two Italian words:
• (accented) for "yes"
• si

SI derived units are part of the SI system of measurement units and are derived from the seven SI base units.

## Dimensionless derived units

The following SI units are actually dimensionless ratios, formed by dividing two identical SI units.