Wrapping the copper wire around an iron nail, increasing the current.   Increase the power going through the wire or have more wire wrapped around the metal object. So in â¦ the case of a nail with wire wrapped around it, the more wraps you do the stronger the electromagnet will be.
Porcupines are a type of rodent found in two main regions of the world, so scientists group them into either Old World or New World porcupines.
They are terrific climbers because of their long claws, and have excellent balance. Porcupines are mainly solitary and nocturnal but sometimes forage during the day. They can live from 10 to 20 years. Porcupines are considered to be intelligent, rapid learners with good memories.hey have dark brown fur, covered with thick barbed quills. One porcupine can have as many as 30,000 quills! Each quill is tipped with microscopic barbs or hooks that drive them deeper into the flesh of unlucky predators. Most porcupines have a robust body, small head, small ears, short legs, and a short, thick tail.