Only a few elements can be permanent magnets - iron is one. Copper is not. But if you pass an electric current through any metal it becomes a magnet - an electromagnet. But how does this work? Well...
in this episode we're going to talk about power how much power does a BB or pellet gun have? How dangerous are they? we're going to shoot various objects in order to find out first...
We are all connected; 私達は全てつながっている。 To each other, biologically お互いに、生物学的に To the earth, chemically 地球に、化学的に To the rest of the universe atomically 残りの宇宙には原子的に。 I think nature's imagination...