Matter & Energy


Matter is composed of atoms or groups of atoms called molecules. The arrangement of particles in a material depends on the physical state of the substance. In a solid, particles form a compact structure that resists flow. Particles in a liquid have more energy than those in a solid. They can flow past one another, but they remain close. Particles in a gas have the most energy. They move rapidly and are separated from one another by relatively large distances.

Babbitt Metal

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Babbitt Metal, any of several soft metal alloys used to line bearings and bushings in order to reduce friction. The metals usually contain large amounts of tin, with smaller amounts of antimony, copper, and lead. The principal alloy consists of 89 percent tin, 7 percent antimony, and 4 percent copper. Babbitt metal is named after its inventor, the American Isaac Babbitt.