8. Define resistance and resistivity and also give the relation between them. Explain the dependence of resistance on temperature.
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What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

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What is the most useful equation for electric power?