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Bette Nesmith Graham (March 23, 1924 – May 12, 1980) was an American typist, commercial artist, and the inventor of the correction fluid Liquid Paper. She was the mother of musician and producer Michael Nesmith of The Monkees.
Mechanics of gelation describes processes relevant to sol-gel process . In a static sense, the fundamental difference between a liquid and a solid is that the solid has elastic resistance against a shearing stress while a liquid does not. Thus, a simple liquid will not typically support a transverse acoustic phonon, or shear wave.