Giancoli Ch. 20 – p. 578-580, Problems #26-32, 36-39, 41-42, 47 key

26) 2.2 x 10-4 T; about 4 times that of Earth
27) 69 A
28)
29) 13 A toward top of page
30) 7.3 x 10-2 N, attractive force
31) 2.5 A max
32) 2.2 x 10-6 T; about 4% that of Earth
36) 2.4 x 10-17 T
37a) (2 x 10-5 T/A)(I – 15 A)
37b) (2 x 10-5 T/A)(I + 15 A)
38) 1.4 x 10-6 T; about 3% that of Earth
39) 4.5 x 10-2 N/m attractive & 2.2 x 10-2 N/m repulsive
41) 2.6 x 10-6 N towards wire (attractive)
42a) 6700 A to the right
42b) not in stable equilibrium (it’s falling)
42c) 6700 A to the left, now stable
47)