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What are the main sources of electrical resistance in a metal?
The factors that affect the electrical resistance of a metal are impurity, temperature and alloying. The free mean path of an electron is the mean distance it travels between successive collisions. For an ideal crystal with no impurities and imperfections the mean free path at 0 K s infinite. That is, there are no collisions and the electrical conductivity is ideally infinite. Introduction of solute atoms into the crystal results in collisions, reducing the mean free path and the conductivity.
how will you prepare acetal from methanal?
A chemical specie decays over time when is subject to air and simultaneously reproduced by another process as given by: where c is the concentration of the specie and co i
chemistry separate the mixture of sand and naphthalene by sublimation
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Objectives After performing this exercise you should be able to: 1. describe the design and organisation of a lab store, 2. suggest modifications in the store design,
A single-effect evaporator is used to concentrate 60000 kg h -1 of a 40 wt % NaOH solution which is fed to the evaporator at 40°C. The concentrated liquid is a 55 wt % NaOH soluti
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