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Gilbert cloud chamber, assembled An alternative view of kit contents. The lab contained a cloud chamber allowing the viewer to watch alpha particles traveling at 12,000 miles per second (19,000,000 m/s), a spinthariscope showing the results of radioactive disintegration on a fluorescent screen, and an electroscope measuring the radioactivity of different substances in the set.
Crossbows and Catapults, also known as Battlegrounds, is a game of physical skill first released in 1983.It has since been published by several different game publishers including Lakeside, Alga (), Base Toys, Tomy and currently Moose Toys (under the name Battlegrounds Crossbows and Catapults).
A slingshot or catapult is a small hand-powered projectile weapon. The classic form consists of a Y-shaped frame, with two tubes or strips made from either a natural rubber or synthetic elastic material. These are attached to the upper two ends. The other ends of the strips lead back to a pouch that holds the projectile. One hand holds the ...
Catapult Learning, Inc. is a provider of K−12 contracted instructional services to public and private schools in the United States.The company’s portfolio of products and services includes intervention, professional development, school improvement, assessment, dropout prevention and recovery, alternative education, and special education programs.
Operation Junkyard is an American television series that aired from October 5, 2002 to February 15, 2003 on Discovery Kids.Essentially a spin-off of TLC's popular series Junkyard Wars, OP/JY featured teams of teens that were challenged to build gadgets out of junk in six hours. [1]
This is an accepted version of this page This is the latest accepted revision, reviewed on 6 January 2025. Siege engine using long arm to throw projectiles For other uses, see Trebuchet (disambiguation). Replica counterweight trebuchets at Château de Castelnaud Counterweight trebuchet used in a siege from the Jami' al-tawarikh, c. 1306-18 A trebuchet [nb 1] is a type of catapult that uses a ...
Two Kentucky residents cheated borrowers and investors out of more than $3 million, a federal grand jury has charged. Mark Carroll, 47, of Lexington and Luke Curry, 36, of Bowling Green were ...
A mass driver or electromagnetic catapult is a proposed method of non-rocket spacelaunch which would use a linear motor to accelerate and catapult payloads up to high speeds. Existing and proposed mass drivers use coils of wire energized by electricity to make electromagnets , though a rotary mass driver has also been proposed. [ 1 ]