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2. Wilson K-Factor - Wikipedia

   en.wikipedia.org/wiki/Wilson_K-Factor

   Wilson K-Factor. Wilson K-Factor refers to the generation of Wilson Sporting Goods tennis racquets that incorporate the "K-Factor" technology. These racquets were first revealed in 2007 and are still popular among players. Roger Federer as well as several other highly ranked players endorsed these racquets up until 2010 making them extremely ...

3. Wilson ProStaff Original 6.0 - Wikipedia

   en.wikipedia.org/wiki/Wilson_ProStaff_Original_6.0

   They further clarified the division in 2014, removing the "6.1" label and releasing the ProStaff as a stand-alone racket series. In the 1990s, Wilson produced a range of lighter Pro Staff models called "Pro Staff Classic Lite." They featured larger head sizes (95 and 110 sq in) and a more flexible frame than either the 6.0 or the 6.1.

4. Wilson Sporting Goods - Wikipedia

   en.wikipedia.org/wiki/Wilson_Sporting_Goods

   The Wilson Sporting Goods Company is an American sports equipment manufacturer based in Chicago, Illinois. Wilson makes equipment for many sports, among them baseball, badminton, American football, basketball, fastpitch softball, golf, racquetball, soccer, squash, tennis, pickleball and volleyball . The company owns the brands Atec, DeMarini ...

5. Racket (sports equipment) - Wikipedia

   en.wikipedia.org/wiki/Racket_(sports_equipment)

   Racquetball racket and ball. A racket or racquet [1] is an item of sporting equipment used to strike a ball or shuttlecock back-and-forth in games such as tennis, badminton, squash, racquetball and padel. The typical basic structure of a racket consists of a widened distal end known as the head (which presents a flattened firm surface designed ...

6. List of telescope parts and construction - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_parts...

   Optics. Mirrors and lenses are the critical light-bending components of a telescope. Objective: The first lens or curved mirror that collects and focuses the incoming light. Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before ...

7. Tennis racket theorem - Wikipedia

   en.wikipedia.org/wiki/Tennis_racket_theorem

   The tennis racket theorem or intermediate axis theorem, is a kinetic phenomenon of classical mechanics which describes the movement of a rigid body with three distinct principal moments of inertia. It has also dubbed the Dzhanibekov effect , after Soviet cosmonaut Vladimir Dzhanibekov , who noticed one of the theorem's logical consequences ...

8. Strings (tennis) - Wikipedia

   en.wikipedia.org/wiki/Strings_(tennis)

   Strings (tennis) In tennis, the strings are the part of a tennis racquet which make contact with the ball. The strings form a woven network inside the head (or "hoop") of the racquet. Strings have been made with a variety of materials and possess varying properties that have been measured, such as dynamic stiffness, tension retention, thickness ...

9. An unusual autumn freeze grips parts of South America ... - AOL

   www.aol.com/news/unusual-autumn-freeze-grips...

   Chileans are bundling up for their coldest autumn in more than 70 years mere days after sunning in T-shirts — a dramatic change of wardrobe brought on this week by a sudden cold front gripping ...