The electrical resistance (R) of an electric wire is given by the following physical law: R = pL / S With: p: electrical resistivity of the metal, L: length of the metal wire, S: right section of the wire radius (r). - This measure is indirect. Why ? -Knowing that p = (17.0 0.2) x100m, L = (2500 pm1) cm r = (1.50 plus / minus 0.05) * m * r, calculate the absolute (AR) and relative (AR / R) uncertainties, -Determine the precision of this indirect measurement of the electrical resistance (R).
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