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Hard Court (tennis)
A tennis court is the venue where the sport of tennis is played. It is a firm rectangular surface with a low net stretched across the centre. The same surface can be used to play both Types of tennis match, doubles and singles matches. A variety of surfaces can be used to create a tennis court, each with its own characteristics which affect the playing style of the game. Dimensions The dimensions of a tennis court are defined and regulated by the International Tennis Federation (ITF) governing body and are written down in the annual 'Rules of Tennis' document. The court is long. Its width is for singles matches and for doubles matches. The service line is from the net. Additional clear space around the court is needed in order for players to reach overrun balls for a total of wide and long. A net is stretched across the full width of the court, parallel with the baselines, dividing it into two equal ends. The net is high at the posts, and high in the center. The net po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrylic Resin
186 px, Polyhydroxyethylmethacrylate is a typical acrylate resin. An acrylic resin is a thermoplastic or thermosetting plastic substance typically derived from acrylic acid, methacrylic acid and acrylate monomers such as butyl acrylate and or methacrylate monomers such as methyl methacrylate. Thermoplastic acrylics designate a group of acrylic resins typically containing both a high molecular weight and a high glass transition temperature which exhibit lacquer dry capability. Acrylic resins designed for use in two component systems for crosslinking with isocyanate are referred to as polyols and are made with the monomers previously mentioned as well as hydroxy monomers such as hydroxy ethyl methacrylate. Acrylic resins are produced in different liquid carriers such as a hydrocarbon solvent (solventborne acrylics or solution acrylics solventborne acrylic selector) or water in which case they are referred to as emulsions or dispersions and they are also provided in 100% solids be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrylic Resin
186 px, Polyhydroxyethylmethacrylate is a typical acrylate resin. An acrylic resin is a thermoplastic or thermosetting plastic substance typically derived from acrylic acid, methacrylic acid and acrylate monomers such as butyl acrylate and or methacrylate monomers such as methyl methacrylate. Thermoplastic acrylics designate a group of acrylic resins typically containing both a high molecular weight and a high glass transition temperature which exhibit lacquer dry capability. Acrylic resins designed for use in two component systems for crosslinking with isocyanate are referred to as polyols and are made with the monomers previously mentioned as well as hydroxy monomers such as hydroxy ethyl methacrylate. Acrylic resins are produced in different liquid carriers such as a hydrocarbon solvent (solventborne acrylics or solution acrylics solventborne acrylic selector) or water in which case they are referred to as emulsions or dispersions and they are also provided in 100% solids be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serve-and-volley
Serve-and-volley is a style of play in tennis where the player serving moves quickly towards the net after hitting a serve, to attempt to hit a volley afterwards. In the serve-and-volley playstyle, the server attempts to hit a volley (a shot where the ball is struck without allowing it to bounce), as opposed to the baseline game, where the server stays back following the serve and attempts to hit a groundstroke (a shot where the ball is allowed to bounce before contact is made). The serve-and-volley style of play has diminished in recent years with advances in racquet and string technologies which allow players to generate a great amount of top spin on groundstrokes and passing shots. The slowing of court surfaces and deflation of balls, promoting longer rallies for the enjoyment of spectators, has also devalued the serve-and-volley style. The aim of this strategy is to put immediate pressure on the opponent with the intent of ending points quickly. Good returns must be made, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serve (tennis)
A serve (or, more formally, a service) in tennis is a shot to start a point. A player will hit the ball with a racquet so it will fall into the diagonally opposite service box without being stopped by the net. Normally players begin a serve by tossing the ball into the air and hitting it (usually near the highest point of the toss). The ball can only touch the net on a return and will be considered good if it falls on the opposite side. If the ball contacts the net on the serve but then proceeds to the proper service box, it is called a ''let''; this is not a legal serve in the major tours (but see below) although it is also not a ''fault''. Players normally serve overhead; however serving underhand is allowed. The serve is the only shot a player can take their time to set up instead of having to react to an opponent's shot; however, as of 2012, there is a 25-second limit to be allowed between points. The serve is one of the most difficult shots for a novice, but once mastered it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Point (tennis)
A point in tennis is the smallest subdivision of the match. A point can consist of a double fault by the server, in which case the point is automatically won by the receiver. In all other cases, a point begins when a legal serve is hit by the server to the receiver on the opposite side of the court, and continues until one side fails to legally return the ball to the opposite side. Whichever side fails to do so loses the point and their opponent wins it. In the advantage scoring system, the first side to win four points by a two-point margin wins the game. To start a game, both sides begin at "love" (zero points). The first point won by a side is called "15," the second point is "30," and the third point is "40." If both sides have won three points in a game (i.e., 40-40), the score is called "deuce." From deuce, whichever side wins the following point is said to have "advantage" and can win the game by winning the next point (two-point margin). If the side with advantage loses th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London - Wimbledon - 3065
London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as '' Londinium'' and retains its medieval boundaries.See also: Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national government and parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority.The Greater London Authority consists of the Mayor of London and the London Assembly. The London Mayor is distinguished from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay Court
A clay court is one of the types of tennis court on which the sport of tennis, originally known as "lawn tennis", is played. Clay courts are made of crushed stone, brick, shale, or other unbound mineral aggregate depending on the tournament. The French Open uses clay courts, the only Grand Slam tournament to do so. Clay courts are more common in Continental Europe and Latin America than in North America, Asia-Pacific or Britain. Two main types exist: red clay, the more common variety, and green clay, also known as "rubico", which is a harder surface. Although less expensive to construct than other types of tennis courts, the maintenance costs of clay are high as the surface must be rolled to preserve flatness. Play Clay courts are considered "slow" because the balls bounce relatively high and lose much of their initial speed when contacting the surface, making it more difficult for a player to deliver an unreturnable shot. Points are usually longer as there are fewer winners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carpet Court
A carpet court is a type of tennis court. The International Tennis Federation describes the surface as a "textile or polymeric material supplied in rolls or sheets of finished product." It is one of the fastest court types, second only to grass courts. The use of carpet courts in ATP Tour competitions ended in 2009. In women's tennis, no WTA Tour tournaments have used carpet courts since the last edition of the Tournoi de Québec in 2018. ATP Challenger and ITF circuit level tournaments with carpet courts continue to exist up to the present (2022). Types There are two types of carpet court. The most common outdoor version consists of artificial turf with a sand in-fill. This type of carpet court became popular in the 1980s in British and Asian tennis clubs for recreational play as they were easier and cheaper to maintain than grass courts. The other type used predominantly for indoor tennis is a textile surface of nylon or rubber matting laid out on a concrete base. They came in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
