Two rocks, one of mass 30 kg and the other of mass 60kg, are separated by a distance of 1.0 m. They exert a gravitational force in each other of magnitude F. Which other pair of rocks exert a force of magnitude F on each other?

The field lines around one end of a bar magnet are shown below based on the diagram, what can you conclude about the pole of the magnet? a.is a south pole because the field hnes spread out from this end b.a north pole because the field lines spread out from this end c.a nouth pole because the field lines enter the magnet at this end d.is a north pole because the field lines enter the magnet at this end