Determine the amount of potential energy of a 5-newton book that is moved to three different shelves on a
bookcase. the height of each shelf is 1.0 meter, 1.5 meters, and 2.0 meters.

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.