Literaturnachweis - Detailanzeige
| Autor/inn/en | Vollmer, M.; Möllmann, K.-P.; Pinno, F. |
|---|---|
| Titel | Cheese cubes, light bulbs, soft drinks: An unusual approach to study convection, radiation, and size dependent heating and cooling. |
| Quelle | In: Didaktik der Physik ... CD zur Frühjahrstagung des Fachverbandes Didaktik der Physik in der Deutschen Physikalischen Gesellschaft, Physikertagung Bochum 2009 (2009) |
| Sprache | deutsch |
| Dokumenttyp | CD-ROM; Zeitschriftenaufsatz |
| ISBN | 978-3-86541-371-0 |
| Schlagwörter | Experiment; Physik; Physikunterricht; Thermodynamik; Konvektion; Experiment; Konvektion; Physik; Physikunterricht; Thermodynamik; Wärmelehre |
| Abstract | The behavior of heating or cooling of physical objects as a function of size is governed by the surface-to-volume-ratio. Its role becomes most obvious in studying heating and cooling curves of differently sized objects with simple geometries like cubes, cylinders or spheres. Simple experiments with cheese cubes, light bulbs and soft drink cans or bottles of other liquids can help to understand not only such size dependencies but also the ratio of the various heat transfer modes of conduction, convection and radiation. A detailed analysis of a number of experiments dealing with heating and cooling of objects is given. The results give also some insight into the range of validity of the simple exponential law of cooling, usually referred to as Newton´s law and allow quick estimates of time constants in such thermal processes. |
| Erfasst von | Arbeitsgruppe Didaktik der Physik, Universität Kassel |
| Update | 2011/2 |
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