Assume the Earth’s magnetic field is b = T northward at th = below the horizontal in Atlanta, Georgia. A tube in a neon sign stretches between two diagonally opposite corners of a shop window—which lies in a north–south vertical plane—and carries current i = A. The current enters the tube at the bottom south corner of the shop’s window. It exits at the opposite corner, which is x = m farther north and y = m higher up. Between these two points, the glowing tube spells out DONUTS. Determine the total vector magnetic force on the tube. Hint: You may use the first “important general statement” presented in the Finalize section of Example 29.4.