Water polo is a team game. Two teams play a match. Each match has four periods called "quarters". The length of each period is usually between 5 and 8 minutes. Because the amount of time spent on fouls or out throws is not counted in the quarter time, an average quarter really lasts around 12 minutes.
Each team has six field players and one goalkeeper. Water polo players need to be good at swimming and ball handing. They need good reflexes and awareness.
Players must keep floating in a game. Players may not stand on the bottom of the pool.
Water polo is played in a pool : depth is above 2 m, a vertical line is 30 m and width is 20 m.
To play water polo, you need swimwear, caps, mouth guards, a ball and a goal.
The caps' design is unique. They are designed to protect head and ears.
The rules of water polo were originally developed in the mid-nineteenth century in Great Britain by William Wilson. The game originated as a form of rugby football played in rivers and lakes in England and Scotland with a ball constructed of Indian rubber, probably from the 1850s onwards.
Fishstick
Fishsticks or fish fingers are a type of food probably invented in the United Kingdom. They are made of a whitefish like cod that is battered and breaded. They are often eaten with tartar sauce, cocktail sauce, or ketchup. "Fishsticks" are popular with children and their parents as an easy-to-prepare finger food that is somewhat healthy for kids.
Fishsticks first came about as a result of the invention of the plate froster in 1929, the first quick freezer. To ensure rapid freezing, food needed to be in slim rectangular slabs. A suitable candidate for this freezing method was fishsticks, slivers (small, thin pieces) cut from large fish and dipped in bread crumbs for frying.
In Britain in the 1950s, most of the herring catch was pickled and exported to other North European countries. In an attempt to make herring more appealing on the home market, companies tried to present it in a new way, creating herring fishsticks called “herring savouries” and were tested on the market against a bland control product of cod sticks, sold as “fish fingers.” Shoppers in Southampton and South Wales, showed an overwhelming preference for the cod. Cod fishsticks were first produced in Great Yarmouth and introduced in Britain on 26 September 1955. They became immensely popular after television advertising began in 1956. To this day, fish sticks are a favorite food among children.
On modern production lines, headless fish are processed through a machine that removes a fillet from each side of the backbone. The fillets then pass over a wheel and a blade that separates the skin from the flesh. Machine filleting leaves a few pin-like bones in the fillet, so the flesh containing the bones is cut out.
Fillets are formed into frozen blocks. A conveyor sends the blanks through batter and breadcrumbs, doubling the thickness of the fishstick. Then each is passed through a hot vegetable oil bath for about one minute to seal the coating and allow the fishstick to be grilled or fried. Then the fishstick is frozen again, with the center reaching -4 °F/-20 °C in less than 20 minutes. After packaging, it is stored at -18 °F/-28 °C, ready for distribution.
Nelly
Cornell Iral Haynes Jr. (born November 2, 1974) is an American rapper, and singer. He is better known as his stage name Nelly. He won three Grammy Awards in 2003.
Boy band
A boy band is a type of musical group with three or more young male singers. Usually, the singers are able to perform as dancers as well. Most singers in boy bands do not play musical instruments. Boy bands usually perform pop or R&B music.
Despite negative critical reception, boy bands continue to be generally successful, with some notable ones managing to sell tens of millions of records, placing them among the world's best selling music artists. The best-selling boy bands based on sales figures are:
Some of the most popular boy bands include the following:
Solo (music)
In musical performance, a solo is a piece or a section of a piece that is played or sung by a single performer. This performer is called a "soloist". A soloist can be a singer or an instrumentalist.
Solos are common in classical music and jazz. In popular music, a "solo" is an improvised melody played by a single performer, such as a guitar solo. In the country music genre a solo is known as a "ride".
Antarctic krill
Antarctic krill ("Euphausia superba") is a species of krill that lives in the Antarctic waters of the Southern Ocean. They are shrimp-like and belong to the invertebrates.
They live in large groups, called swarms. Sometimes these swarms have a density of 10,000–30,000 individual animals per cubic meter.
They feed directly on very small phytoplankton, so they can use the energy that the phytoplankton originally got from the sun in order to sustain their life in the open ocean. They grow to a length of 6 cm, weigh up to 2 g, and can live for up to six years. They are a key species in the Antarctic ecosystem and are, in terms of biomass, probably the most successful animal species on the planet (approximately 500 million tonnes).
In aquaria, krill have been observed to eat each other.
Cubic metre
The cubic metre (symbol m³) is the SI unit of volume. It is a cube with a length, height, and width of one metre, with 1,000 litres of space.
In the many places it is spelled "cubic meter". Other names are stère and kilolitre or kiloliter.
1 cubic metre equals:
A cubic metre of pure water at the temperature of maximum density (3.98 °C) and standard atmospheric pressure (101.325 kPa) has a mass of 1000 kg, or one tonne. At 0 °C, the freezing point of water, it is slightly less, 999.972 kg.
It is sometimes abbreviated ', ', ', ', , when superscript characters or markup are not available/accessible (i.e. in some typewritten documents and postings in Usenet newsgroups).
Abbreviated CBM in the freight business and MTQ (or numeric code 49) in international trade.
Food and Agriculture Organization
The Food and Agriculture Organization of the United Nations (FAO) is a specialized agency of the United Nations that leads international efforts to defeat hunger established on 16 October 1945.
It serves both developed and developing countries and acts as a neutral forum where all nations meet as equals. FAO is also a source of knowledge and information, and helps developing countries and countries in transition modernize and improve agriculture, forestry and fisheries practices, ensuring good nutrition and food security for all.
Colorimeter
A colorimeter is a device used for measuring colours, or colorimetry. It measures the absorbance of different wavelengths of light in a solution. It can be used to measure the concentration of a known solute.
Different chemical substances absorb different wavelengths of light. When the concentration of the solute is higher, it absorbs more light in a specific wavelength. This is known as the Beer-Lambert law.
The most important parts of a colorimeter are:
Different filters are used to select the wavelength of light which the solution absorbs the most. This makes the colorimeter more accurate. Solutions are usually placed in glass or plastic cuvettes. The usual wavelengths used are between 400 and 700 nanometers. If it is necessary to use ultraviolet light (below 400 nanometers) then the lamp and filters must be changed.
The output of the colorimeter may be shown in graphs or tables, by an analogue or digital meter. The data may be printed on paper, or stored in a computer. The output may be shown as transmittance (a linear scale from 0-100%) or as absorbance (a logarithmic scale from zero to infinity). The useful range of the absorbance scale is from 0-2 but it is desirable to keep within the range 0-1 because, above 1, the results become unreliable due to scattering of light. A Transmittance-Absorbance conversion table may be seen here.
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