metallic bottle top can be loosened by holding them in hot water what is the reason for this A, The expansion of the gas pushes the metal top out ward B, The expansion of the metal faster than expansion of the bottle C, water reduces the friction between bottle and the metal top D, The increase in air pressure in the bottle pushes out the metal

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