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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] |
Tommy Haas Serves
Tommy may refer to: People * Tommy (given name) * Tommy Atkins, or just Tommy, a slang term for a common soldier in the British Army Arts and entertainment Film and television * ''Tommy'' (1931 film), a Soviet drama film * ''Tommy'' (1975 film), a British operetta film based on the Who's album ''Tommy'' * ''Tommy'' (2015 film), a Telugu drama film * ''Tommy'' (TV series), a 2020 American drama series Literature * ''Tommy'' (King poem), by Stephen King, 2010 * ''Tommy'' (Kipling poem), by Rudyard Kipling, 1892 Music * ''Tommy'' (The Who album), 1969 ** ''Tommy'' (London Symphony Orchestra album), 1972 ** ''Tommy'' (soundtrack), a soundtrack to the 1975 film ** ''The Who's Tommy'', a stage production, premiered 1992 * ''Tommy'' (The Wedding Present album), 1988 * ''Tommy'' (Dosh album), 2010 * ''Tommy'' (EP), a 2017 EP by Klein * ''Tommy'', a 2022 EP by Kiesza * ''Tommy'', a 1965 album by Tommy Adderley * ''Tommy'', a 1970 EP by The Who * "Tommy", a 1991 song by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnus Effect
The Magnus effect is an observable phenomenon commonly associated with a spinning object moving through a fluid. The path of the spinning object is deflected in a manner not present when the object is not spinning. The deflection can be explained by the difference in pressure of the fluid on opposite sides of the spinning object. The Magnus effect is dependent on the speed of rotation. The most readily observable case of the Magnus effect is when a spinning sphere (or cylinder) curves away from the arc it would follow if it were not spinning. It is often used by association football and volleyball players, baseball pitchers, and cricket bowlers. Consequently, the phenomenon is important in the study of the physics of many ball sports. It is also an important factor in the study of the effects of spinning on guided missiles—and has some engineering uses, for instance in the design of rotor ships and Flettner aeroplanes. Topspin in ball games is defined as spin about a ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawk-Eye
Hawk-Eye is a computer vision system used in numerous sports such as cricket, tennis, Gaelic football, badminton, hurling, rugby union, association football and volleyball, to visually track the trajectory of the ball and display a profile of its statistically most likely path as a moving image. The onscreen representation of the trajectory results is called Shot Spot. The Sony-owned Hawk-Eye system was developed in the United Kingdom by Paul Hawkins. The system was originally implemented in 2000 for television purposes in cricket. The system works via six (sometimes seven) high-performance cameras, normally positioned on the underside of the stadium roof, which track the ball from different angles. The video from the six cameras is then triangulated and combined to create a three-dimensional representation of the ball's trajectory. Hawk-Eye is not infallible, but is advertised to be accurate to within 3.6 millimetres and generally trusted as an impartial second opinion in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pat-a-cake, Pat-a-cake, Baker's Man
"Pat-a-Cake, Pat-a-Cake, Baker’s Man", "Pat-a-Cake", "Patty-cake" or "Pattycake" is an English nursery rhyme. It has a Roud Folk Song Index number of 6486. Verse :Pat-a-cake, pat-a-cake, baker's man. :Bake me a cake as fast as you can :Roll it, pat it, and mark it with a B :Throw it in the oven for Baby and me. I. Opie and P. Opie, The Oxford Dictionary of Nursery Rhymes' (Oxford University Press, 1951, 2nd edn., 1997), pp. 341–2. . Origins The earliest recorded version of the rhyme appears in Thomas D'Urfey's play ''The Campaigners'' from 1698, where a nurse says to her charges: ...and pat a cake Bakers man, so I will master as I can, and prick it, and prick it, and prick it, and prick it, and prick it, and throw't into the Oven. The next appearance is in ''Mother Goose's Melody'' (c. 1765) in the form: :Patty Cake, Patty Cake, :Baker's Man; :That I will Master, :As fast as I can; :Pat it and prick it, :And mark it with a T, :And there will be enough for Tommy and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
