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27 Nov 2019
A blob of 500 grams of copper (density of copper is 8.96 grams/cm^3) is to be made into a long straight wire with a circular cross section. his means that the wire is a long thin cylinder (Volume of a cylinder is pr^2h). The wire must be at least 12 meters long to be used as part of a certain electrical circuit. What length of wire should be made from this copper in order to have minimal resistance. The formula for resistance of a wire is R= ?l/A, and the resistivity of copper is 1.72*10^-8 Ohm-meter.
A blob of 500 grams of copper (density of copper is 8.96 grams/cm^3) is to be made into a long straight wire with a circular cross section. his means that the wire is a long thin cylinder (Volume of a cylinder is pr^2h). The wire must be at least 12 meters long to be used as part of a certain electrical circuit. What length of wire should be made from this copper in order to have minimal resistance. The formula for resistance of a wire is R= ?l/A, and the resistivity of copper is 1.72*10^-8 Ohm-meter.
Bunny GreenfelderLv2
10 Apr 2019
