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.
Origins: That a porcupine can throw its quills at an attacker is a widely-believed bit of animal misinformation. Porcupines bristle up when alarmed, and a small muscle attached to each quill pulls it upright in the fur.