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.
Bowlegged and pigeon-toed, the porcupine slowly ambles along, swinging its fat body from side to side, muttering to itself. A pleasant enough creature when left alone, the porcupine is quick to defend itself at the slightest threat. With a top speed of little more than a fast waddle, it can escape very few animals; however, its defensive weapons are so effective, it has no need for speed.