Skills for solving circuit problems
BMT subway rail resistance The BMT subway line in New York City stretches roughly 30 km from the Bronx to Brooklyn. The electrified rail on which it runs has a cross section of about 40 cm2 and is made of steel with a resistivity of 10 x 10- 8 ? . m. Make a list of all the physical quantities describing different properties of the rail that you can determine using this information. Then calculate the values of one quantity related to the electrical properties and one quantity not related to the electrical properties.
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