Kilowatt hour

The kilowatt hour (symbol kWh, kW·h, or kW h) is a derived unit of energy equal to 3.6 megajoules. If the energy is being transmitted or used at a constant rate (power) over a period of time, the total energy in kilowatt-hours is the product of the power in kilowatts and the time in hours. The kilowatt-hour is commonly used as a billing unit for energy delivered to consumers by electric utilities.

Definition

The kilowatt-hour (symbolized kW⋅h) is a unit of energy equivalent to one kilowatt (1 kW) of power sustained for one hour.

One watt is equal to 1 J/s. One kilowatt-hour is 3.6 megajoules, which is the amount of energy converted if work is done at an average rate of one thousand watts for one hour.

Note that the international standard SI unit of energy is the joule. The hour is a unit of time "outside the SI", so the kilowatt-hour is a non-SI unit of energy. It is not listed among the non-SI units accepted by the BIPM for use with the SI.

Examples

An electric heater rated at 1000 watts (1 kilowatt), operating for one hour uses one kilowatt-hour (equivalent to 3.6 megajoules) of energy. A television rated at 100 watts operating for 10 hours continuously uses one kilowatt-hour. A 40-watt light bulb operating continuously for 25 hours uses one kilowatt-hour.

WH

WH, W.H., or wh may refer to:

Places

Wuhan, Hubei, China

Linguistics

Other uses

Five Ws

The Five Ws, Five Ws and one H, or the Six Ws are questions whose answers are considered basic in information-gathering. They are often mentioned in journalism (cf. news style), research, and police investigations. They constitute a formula for getting the complete story on a subject. According to the principle of the Five Ws, a report can only be considered complete if it answers these questions starting with an interrogative word:

Some authors add a sixth question, “how�, to the list, though "how" can also be covered by "what", "when", or "where":

Each question should have a factual answer — facts necessary to include for a report to be considered complete. Importantly, none of these questions can be answered with a simple "yes" or "no".

In the United Kingdom (excluding Scotland), the Five Ws are used in Key Stage 2 and Key Stage 3 lessons.

History

Rhetoric

This section focuses on the history of the series of questions as a way of formulating or analyzing rhetorical questions, and not the theory of circumstances in general.

W postcode area

Postcode district boundaries: Bing / Google

The W (Western and Paddington) postcode area, also known as the London W postcode area is a group of postcode districts covering part of central and part of west London, England. The area originates from the Western (W1) and Paddington (W2-14) districts of the London postal district.

Postal administration

The Western district consists of the single original W1 postal district. The area it covers is of very high density development and it has been subdivided into a number of smaller postcode districts. Where districts are used for purposes other than the sorting of mail, such as use as a geographic reference and on street signs, the W1 subdivisions continue to be classed as one 'district'. In June 2000 there was a recoding of the area with the W1M, W1N, W1P, W1R, W1V, W1X and W1Y districts replaced.

The mail centre for W1 is London Central and for W2-14 is Greenford.

Deliveries for W1 (and for WC1 and WC2) came from the Western District Office office on Rathbone Place, until it was decommissioned. This office was a stop on the former London Post Office Railway, which has been mothballed since 2003. The Western District Office was initially located on Wimpole Street, which was also a stop on the London Post Office Railway.

W. H. R. Rivers

William Halse Rivers Rivers, FRCP, FRS, ((1864-03-12)12 March 1864 – 4 June 1922(1922-06-04)) was an English anthropologist, neurologist, ethnologist and psychiatrist, best known for his work treating World War I officers who were suffering from shell shock. Rivers's most famous patient was the poet Siegfried Sassoon, with whom he remained close friends until his own sudden death. Rivers was a fellow of St John's College, Cambridge, and is also notable for his participation in the Torres Straits expedition of 1898 and his consequent seminal work on the subject of kinship.

Biography

Family background

Rivers was born in 1864 at Constitution Hill, Chatham, Kent, son of Elizabeth Hunt (16 October 1834 – 13 November 1897) and Henry Frederick Rivers (7 January 1830 – 9 December 1911).

Records from the eighteenth and early nineteenth centuries show the Rivers family to be solidly middle-class with many Cambridge, Church of England and Royal Navy associations, the most famous of which were Midshipman William Rivers and his father Gunner Rivers who both served aboard HMS Victory.

Höðr

Höðr (often anglicized as Hod, Hoder, or Hodur) is a blind god and the brother of Baldr in Norse mythology. Tricked and guided by Loki, he shot the mistletoe arrow which was to slay the otherwise invulnerable Baldr.

According to the Prose Edda and the Poetic Edda, the goddess Frigg, Baldr's mother, made everything in existence swear never to harm Baldr, except for the mistletoe, which she found too unimportant to ask (alternatively, which she found too young to demand an oath from). The gods amused themselves by trying weapons on Baldr and seeing them fail to do any harm. Loki, the mischief-maker, upon finding out about Baldr's one weakness, made a spear from mistletoe, and helped Höðr shoot it at Baldr. In reaction to this, Odin and the giantess Rindr gave birth to Váli, who grew to adulthood within a day and slew Höðr.

The Danish historian Saxo Grammaticus recorded an alternative version of this myth in his Gesta Danorum. In this version, the mortal hero Høtherus and the demi-god Balderus compete for the hand of Nanna. Ultimately, Høtherus slays Balderus.

Höör

Höör (Swedish pronunciation: [hÅ“Ë?r]) is a locality and the seat of Höör Municipality, SkÃ¥ne County, Sweden with 7,865 inhabitants in 2010.

The town's original spelling was Hör. The present, unusual spelling with double "ö" was implemented by the Swedish postal service at the beginning of the 20th century. At that time, it was a common practice in Sweden to write Här (for here) on the address column of local letters. In order to avoid confusion between letters to be delivered locally and those intended for Hör, the postal service has therefore changed the town's name to Höör.

Transport

Höör railway station is located on the northern side of the town and a five-minute walk into the central square. It is on the line between Kristianstad and Malmö, where there are frequent commuter trains running beyond Sweden to Copenhagen in Denmark.

The following services call at this station (incomplete):