Where did the first portuguese colonists settle in brazil in the coastal areas of the northeast region in the cities of the southeast region in the interior plateau of the highlands in the amazon river basin region

Renaldo and nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. when they test the electromagnet, it can pick up 6 paper clips. their teacher wants all groups to pick up at least 10 paper clips. what could renaldo and nasreen do to increase the number of paper clips their electromagnet picks up?