Nespelem School
P O Box 291
Nespelem, WA 99155
8th grade
Sheri Edwards
My research question is what affect will the metals have on the signal of the metal detector? My hypothesis is that nickel & tin will be less detected than the other metals. My topic is to find out which metals are less detected by the metal detector.
I tested my hypothesis by using a very common metal first that is easy to get. The metal was aluminum. Step 1: Have adult cut 3" by 3" flat squares of the 6 metals you choose. Step 2: Find suitable area that is level and obtains no metals objects or fragments of any sort. Step 3: using the four sticks spread and stick in ground 3 inches and spread apart 3 feet or 1 yard. Also using the string, make a wall around the sticks not on top. Step 4: Before using the metal detector install 2 rectangular shaped transistor 3-volt batteries. Use both same battery brands. Also use same batteries in all tests. Step 5: Lay the control testing metal in testing perimeter or boundaries. Adjust knobs to best satisfaction. Use a sweep and an arc equal to the ground level. Also use 2 feet sweep parallel to ground. Repeat last step with every metal.
I found out that aluminum was less detected. Also that my hypothesis proved wrong about nickel & tin. But nickel & tin came out to be the second less detected. It came out as an average to be (7.83). The winner Aluminum came to be a (7.67). Also That it has less of a magnetic field that could be detected when the electrons start to become jumpy or active. That would make them spin by repelling. But I tested a metal that is a very common and easy to find. That metal was aluminum.
I found out that aluminum was less detected. Also that my hypothesis proved wrong about nickel & tin. But nickel & tin came out to be the second less detected. It came out as an average to be (7.83). The winner Aluminum came to be a (7.67). So that means that it has less electrons to move around to create an eddy current. So the magnetic field of the metal detector could not detect it very well.
Say I was a FBI agent. I also was head of all operations. I would face a death sentence if I were to let something bad happen to the president, even if it was accidental. If the Preseident was invited to this town to bring kids a better education, like computers and books. and was going to give a few speeches to the town's citizens, suppose one of the students didn't want all of that nerdy stuff and decided to build a bomb that would be virtually undetectable to a metal detector. All of the other FBI agents under me would need to know what types of things to look for. We could do some tests and some experiment to find out things normal people might have not even known. Then the bad guy would go through thinking where he could plant the bomb and set it, but he would get searched down to the very last sock, and so he would get caught under all aspects.