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Iniguez, J.; Raposo, V. – European Journal of Physics, 2009
In this paper we analyse the behaviour of a small-scale model of a magnetic levitation system based on the Inductrack concept. Drag and lift forces acting on our prototype, moving above a continuous copper track, are studied analytically following a simple low-speed approach. The experimental results are in good agreement with the theoretical…
Descriptors: Measures (Individuals), Science Laboratories, Magnets, Physics
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Weizman, Haim – Journal of Chemical Education, 2008
When FT-NMR is used to collect data without a sufficient delay time between subsequent pulses, the integrated area under certain peaks may result in a lower value than should be observed under appropriate conditions. This discrepancy in integration may deceive the inexperienced eye and consequently can lead to a wrong assignment of the NMR…
Descriptors: Organic Chemistry, Science Instruction, College Science, Science Laboratories