Reimu and Marisa did their best to dodge the debris coming at them. For them, dodging was 2nd nature. They ended up backpedaling at least 50 feet away from Alex' stunt.
@Random. Depends on the material, really. It's not so much the density of an object, it's the electron cloud structure around the nucleus, and the nucleus itself that determines an element's conductivity. My guess would be that if you were to somehow increase the density of copper by compressing it for example, the resistance would drop because it would allow the electrons to make easier jumps from atom to atom. On the other hand it also brings the impurities closer together, increasing the resistance.
@Random. Depends on the material, really. It's not so much the density of an object, it's the electron cloud structure around the nucleus, and the nucleus itself that determines an element's conductivity. My guess would be that if you were to somehow increase the density of copper by compressing it for example, the resistance would drop because it would allow the electrons to make easier jumps from atom to atom. On the other hand it also brings the impurities closer together, increasing the resistance.