Headline Clickable. Whether raw or cooked, food can be chock-full of dangerous bacteria long before you can smell it. Perishable food (like chicken and other meats) should be tossed if left out at room temperature more than two hours (much less if in a warm room).
Catapult physics is basically the use of stored energy to hurl a projectile (the payload), without the use of an explosive. The three primary energy storage mechanisms are tension, torsion, and gravity.
The noun CATAPULT has 3 senses: 1. a plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones. 2. a device that launches aircraft from a warship. 3. medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles.