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.
Description. The North American porcupine is second in size to the beaver among rodents in North America and has the northernmost range of all the worldâs porcupines. This stout, short-legged mammal is covered with hair and quills of varying length, except on the foot pads and nose and belly.