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FastGames - Dummy Crusher

Launch missiles at Ragdoll dummies in this awesome physics game! Dummy Crusher is a super addictive puzzle game with a very simple objective: Launch missiles at all the ragdolls that explode in a pile of blood! Get all sorts of different weapons and use them against the dummies! How far can you make it in this challenging game? Good luck!

Bearing (mechanical) - Wikipedia

A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.

Realistic Designs N-Q - Atomic Rockets

The easiest propellant to manufacture is liquid carbon dioxide. It can be produced from the Martian atmosphere using just high pressure (690 kPa) with no cryogenic cooling needed (a 30 horsepower pump will do, requiring 25 kW, or 80 kilowatt hours per metric ton).