Fragmentation experiment and model for falling mercury drops |
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Authors: | PMC de Oliveira CAF Leite CV Chianca JS Sá Martins CF Moukarzel |
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Institution: | 1. Instituto de Física, Universidade Federal Fluminense, av. Litorânea s/n, Boa Viagem, Niterói 24210-340, Brazil;2. Departamento de Fisica Aplicada, CINVESTAV Unidad Merida, Antigua Carretera a Progresso, km 6, 97310 Merida, Mexico |
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Abstract: | The experiment consists of counting and measuring the size of the many fragments observed after the fall of a mercury drop on the floor. The size distribution follows a power-law for large enough fragments. We address the question of a possible crossover to a second, different power-law for small enough fragments. Two series of experiments were performed. The first uses a traditional film photographic camera, and the picture is later treated on a computer in order to count the fragments and classify them according to their sizes. The second uses a modern digital camera. The first approach has the advantage of a better resolution for small fragment sizes. The second, although with a poorer size resolution, is more reliable concerning the counting of all fragments up to its resolution limit. Both together clearly indicate the real existence of the quoted crossover. |
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Keywords: | Fragmentation crossover Lattice drop model |
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