Draw magnetic field (b field) line diagrams for the following. make sure the diagrams are large enough so the direction and shape of the magnetic field is very clear. include magnetic field lines that are far from their sources. a. a bar magnet (be sure to label the north and south pole). b. a horseshoe magnet (be sure to label the north and south pole). c. a long straight wire with an electric current in it (be sure to label the direction of the current).

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?