Which of the following does NOT change the amount of resistance to the flow of electrons in a wire?
Length of the wire
Diameter of the wire
Amount of insulation surrounding the wire
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The material the wire is made from

Gabe amodeo, a nuclear physicist, needs 8080 liters of a 3030% acid solution. he currently has a 20 %20% solution and a 60 %60% solution. how many liters of each does he need to make the needed 8080 liters of 3030% acid solution?