Giancoli Ch. 18 – p. 516, Problems #12-16, 20-22 key

12) 4.7 x 10-4 m

13) 3.3 x 10-2 Ω

14) 1.2

15) 4.6 mm = 4.6 x 10-3 m

16) make the cut at 20% of the length of the wire; Rshort = 2.0 Ω; Rlong = 8.0 Ω

20) 2.5 V

21a) Rx = 3.8 x 10-4 Ω

21b) Ry = 1.5 x 10-3 Ω

21c) Rz = 6.0 x 10-3 Ω