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Rules Of Water Polo
The rules of water polo are the rules and regulations which cover the play, procedure, equipment and officiating of water polo. These rules are similar throughout the world, although slight variations do occur regionally and depending on the governing body. Governing bodies of water polo include FINA, the international governing organization for the rules; the NCAA, which govern the rules for collegiate matches in the United States; the NFHS, which govern the rules in high schools in the USA; and the IOC, which govern the rules at Olympic events. Core rules :''Note: Rules below reflect the latest FINA Water Polo Rules.'' The sport of Water Polo, as its name suggests, is played in a pool of water that resembles a soccer or hockey court, having 2 goal posts at each end of the pool. Number of players Senior games consist of seven players from each team (six field players and a goalkeeper) that are allowed in the playing area of the pool during gameplay. FINA reduced the number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Polo
Water polo is a competitive team sport played in water between two teams of seven players each. The game consists of four quarters in which the teams attempt to score goals by throwing the ball into the opposing team's goal. The team with the most goals at the end of the game wins the match. Each team is made up of six field players and one goalkeeper. Excluding the goalkeeper, players participate in both offensive and defensive roles. It is typically played in an all-deep pool where players cannot touch the bottom. A game consists mainly of the players swimming to move about the pool, treading water (mainly using the eggbeater kick), passing the ball, and shooting at the goal. Teamwork, tactical thinking and awareness are also highly important aspects. Water polo is a highly physical and demanding sport and has frequently been cited as one of the most difficult to play. Special equipment for water polo includes a water polo ball, a ball of varying colors which floats on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tenth Grade
Tenth grade or grade 10 (called Year Eleven in England and Wales, and sophomore year in the US) is the tenth year of school post-kindergarten or the tenth year after the first introductory year upon entering compulsory schooling. In many parts of the world, the students are 15 or 16 years of age, depending on when their birthday occurs. The variants of 10th grade in various countries are described below. Australia For most Australian states, Year 10 is the fourth year of a student's high school education. However, in the Northern Territory, it is the first year of senior school, which occurs after high school. While in contrast, in most South Australian public schools, it is the third year of high school. For more in depth information on Australia's education system, see: Education in Australia. Belgium In Belgium, the 10th grade is called ''4e secondaire'' in French (Walloon), or ''4de middelbaar'' in Dutch (Flemish). Brazil In Brazil, the tenth grade is the ''"primeiro ano d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stopwatch
A stopwatch is a timepiece designed to measure the amount of time that elapses between its activation and deactivation. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stop clock. In manual timing, the clock is started and stopped by a person pressing a button. In fully automatic time, both starting and stopping are triggered automatically, by sensors. The timing functions are traditionally controlled by two buttons on the case. Pressing the top button starts the timer running, and pressing the button a second time stops it, leaving the elapsed time displayed. A press of the second button then resets the stopwatch to zero. The second button is also used to record ''split times'' or ''lap times''. When the split time button is pressed while the watch is running it allows the elapsed time to that point to be read, but the watch mechanism continues running to record total elapsed time. Pressing the split button a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whistle
A whistle is an instrument which produces sound from a stream of gas, most commonly air. It may be mouth-operated, or powered by air pressure, steam, or other means. Whistles vary in size from a small slide whistle or nose flute type to a large multi-piped church organ. Whistles have been around since early humans first carved out a gourd or branch and found they could make sound with it. In prehistoric Egypt, small shells were used as whistles. Many present day wind instruments are inheritors of these early whistles. With the rise of more mechanical power, other forms of whistles have been developed. One characteristic of a whistle is that it creates a pure, or nearly pure, tone. The conversion of flow energy to sound comes from an interaction between a solid material and a fluid stream. The forces in some whistles are sufficient to set the solid material in motion. Classic examples are Aeolian tones that result in galloping power lines, or the Tacoma Narrows Bridge (the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hand Gesture
A hand is a prehensile, multi-fingered appendage located at the end of the forearm or forelimb of primates such as humans, chimpanzees, monkeys, and lemurs. A few other vertebrates such as the koala (which has two opposable thumbs on each "hand" and fingerprints extremely similar to human fingerprints) are often described as having "hands" instead of paws on their front limbs. The raccoon is usually described as having "hands" though opposable thumbs are lacking. Some evolutionary anatomists use the term ''hand'' to refer to the appendage of digits on the forelimb more generally—for example, in the context of whether the three digits of the bird hand involved the same homologous loss of two digits as in the dinosaur hand. The human hand usually has five digits: four fingers plus one thumb; these are often referred to collectively as five fingers, however, whereby the thumb is included as one of the fingers. It has 27 bones, not including the sesamoid bone, the number of whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sudden Death (sports)
In a sport or game, sudden death (also sudden-death, sudden-death overtime, or a sudden-death round) is a form of competition where play ends as soon as one competitor is ahead of the others, with that competitor becoming the winner. Sudden death is typically used as a tiebreaker when a contest is tied at the end of regulation (normal) playing time or the completion of the normal playing task. An alternative tiebreaker method to sudden death is to play an extra, shortened segment of the game. In association football 30 minutes of extra time (overtime) after 90 minutes of normal time, or in golf one playoff round (18 holes) after four standard rounds (72 holes) are two alternatives. Sudden death playoffs typically end more quickly than the shortened play alternative. Reducing the variability of the event's duration assists those scheduling television time and team travel. Fans may see sudden death as exciting and suspenseful, or they may view the format as compromising the sport, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penalty Shootout
The penalty shootout is a method of determining a winner in sports matches that would have otherwise been drawn or tied. The rules for penalty shootouts vary between sports and even different competitions; however, the usual form is similar to penalty shots in that a single player takes one shot on goal from a specified spot, the only defender being the goalkeeper. If the result is still tied, the shootout usually continues on a "goal-for-goal" basis, with the teams taking shots alternately, and the one that scores a goal unmatched by the other team is declared the winner. This may continue until every player has taken a shot, after which players may take extra shots, until the tie is broken, and is also known as "sudden death". Rationale A penalty shootout is normally used only in "no ties allowed" situations (for example, a tournament where the losers must be eliminated) and where other methods such as extra time, sudden death, and/or the away goal rule have failed to determine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Polo Swimoff
Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent). It is vital for all known forms of life, despite not providing food, energy or organic micronutrients. Its chemical formula, H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is also the name of the liquid state of H2O at standard temperature and pressure. A number of natural states of water exist. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor. Water covers ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Polo Ball
A water polo ball is a ball used in water polo and canoe polo, usually characterized by a bright yellow color and ease of grip ability, so as to allow it to be held with one hand despite its large size. Standard water polo ball characteristics Water Polo Balls come in standard sizes: * Size 5: Men's water polo ball. Circumference of the ball shall be not less than 0.68 metres and not more than 0.71 metres. Ball weight is 400-450 grams (14-16 ounces) and inflated to 90-97 kPa (kilopascals) gauge pressure (13-14 psi) * Size 4: Compact (age 14 & under boys) and Women's water polo ball. Circumference of the ball shall be not less than 0.65 metres and not more than 0.67 metres. Ball weight is 400-450 grams (14-16 ounces) and inflated to 83-90 kPa (12-13 psi) for women. * Size 3: Intermediate (age 14 & under girls and 12 & under boys) water polo ball. * Size 2: Junior (age 12 & under girls and 10 & under co-ed) water polo ball. * Size 1: Splashball (age 8 and under boys and girls) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2020 Summer Olympics
The , officially the and also known as , was an international multi-sport event held from 23 July to 8 August 2021 in Tokyo, Japan, with some preliminary events that began on 21 July. Tokyo was selected as the host city during the 125th IOC Session in Buenos Aires, Argentina, on 7 September 2013. The Games were originally scheduled to take place from 24 July to 9 August 2020, but due to the global COVID-19 pandemic, on 24 March 2020, the event was postponed to 2021, the first such instance in the history of the Olympic Games (previous games had been cancelled but not rescheduled). However, the event retained the ''Tokyo 2020'' branding for marketing purpose.Multiple sources: * * * It was largely held behind closed doors with no public spectators permitted due to the declaration of a state of emergency in the Greater Tokyo Area in response to the pandemic, the first and so far only Olympic Games to be held without official spectators. The Games were the mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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