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.
The North American porcupine is the second largest of all rodents. Porcupines have small heads and chunky bodies and grow up to 25 to 40 inches long from head to tail. The tail can grow as long as 8 inches. The male and female are approximately the same size and can weigh between 10 and 40 pounds.