In the diagrams below, a compass is placed above or beneath each wire. Draw a large arrow to the side, showing the direction
of the current. Then draw the compass needles, showing the
direction they point.

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.