You and a friend are asked to draw the two-dimensional electric field line pattern for two charged objects located near each other. the charge on the first object is 2q (with q positive), and the charge on the second object is −q. you show 32 field lines emanating from the first charge and 16 field lines terminating on the second charge. your friend shows 24 field lines emanating from the first object and 12 terminating on the second object.

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i. e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i. e. include the distance traveled to the first encounter)