How does the gravitational force that Mars exerts on Sam, an astronaut on the surface of mars, compared to the gravitational force that Sam exerts on Mars? a) The gravitational force depends on where Sam stands on Mars
b) The gravitational force they exert on each other is equal
c) Sam exerts a greater gravitational force on Mars
d) Mars exerts a greater gravitational force on Sam

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