A high voltage transmissio line of diameter 2 cm and length 150 km carries a steady current of 1000 A. If the conductor is copper with a free charge density of 8 * 10^28, how long does it tkae one electron to travel the ful length of the cabe

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?