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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

   The Pro Staff 6.0 version was manufactured in four head sizes: 85, 95, 110, and 125 square inches. The 85 is unforgiving for the currently popular semi-western topspin style with its 12.6 ounce (357 g) weight and low power. The 95 is more forgiving of off-center shots with an overall weight of 12.2 ounces (350 g) and a lower swingweight (317 as ...

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. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   3LR12 (4.5-volt), D, C, AA, AAA, AAAA (1.5-volt), A23 (12-volt), PP3 (9-volt), CR2032 (3-volt), and LR44 (1.5-volt) batteries. This is a list of the sizes, shapes, and general characteristics of some common primary and secondary battery types in household, automotive and light industrial use. The complete nomenclature for a battery specifies ...

6. 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 ...

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 ...