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  2. Potato cannon - Wikipedia

    en.wikipedia.org/wiki/Potato_cannon

    PVC dry ice cannon in use, 1.5kg (3 pounds) of concrete is poured at the bottom to reinforce it, and plastic sleeves are used to stiffen the lower (highest pressure) part. The oldest examples simply involve dropping pieces of dry ice into a tube closed at one end and sealing the other end by jamming the projectile in.

  3. William Gurstelle - Wikipedia

    en.wikipedia.org/wiki/William_Gurstelle

    Backyard Ballistics : build potato cannons, paper match rockets, Cincinnati fire kites, tennis ball mortars, and more dynamite devices. Chicago: Chicago Review Press. ISBN 978-1-55652-375-5. OCLC 45861947. Gurstelle, William (2003). Building bots : designing and building warrior robots. Chicago: Chicago Review Press. ISBN 978-1-55652-459-2.

  4. MythBusters (2008 season) - Wikipedia

    en.wikipedia.org/wiki/MythBusters_(2008_season)

    Anthony proved that he could catch tennis balls traveling at 85 miles per hour (137 km/h) (breaking a world record in the process). They then had him try to catch an actual arrow, and Anthony succeeded in catching an arrow. However, at Anthony's request, the arrow had been fired below full strength (3/4 strength) and directly in front of him.

  5. Gyroscopic exercise tool - Wikipedia

    en.wikipedia.org/wiki/Gyroscopic_exercise_tool

    The device consists of a tennis ball-sized plastic or metal shell surrounding a free-spinning mass, with an inner heavy core, which can be spun by a short rip string or using a self-start mechanism by means of rewinding it against a spring to give it potential energy.

  6. Tennis ball - Wikipedia

    en.wikipedia.org/wiki/Tennis_ball

    This is an accepted version of this page This is the latest accepted revision, reviewed on 2 January 2025. Ball used in the sport of tennis Tennis balls at the 2012 French Open A tennis ball is a small, hollow ball used in games of tennis and real tennis. Tennis balls are fluorescent yellow in professional competitions, but in recreational play other colors are also used. Tennis balls are ...

  7. List of American Gladiators events - Wikipedia

    en.wikipedia.org/wiki/List_of_American...

    The contender had 60 seconds to hit a target using a series of projectile weapons, while avoiding high-speed tennis balls being fired at them by a Gladiator using an air-powered cannon. The course spanned the entire arena floor with each weapon located at a safe zone that provided some cover for the contender.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Penn Racquet Sports - Wikipedia

    en.wikipedia.org/wiki/Penn_Racquet_Sports

    A Penn Championship tennis ball Penn 3 balls, new and used Penn racquetball Penn Racquet Sports, Inc. is a subsidiary of Head N.V. that manufactures tennis balls and racquetballs. Penn was founded in 1910 as Pennsylvania Rubber Company of America, Inc. in Jeannette, Pennsylvania . [ 1 ]

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