Two uncharged metal spheres, L and M, are in contact. A negatively charged rod is brought close to L, but not touching it, as shown. The two spheres are slightly separated and the rod is then withdrawn. As a result:
【简答题】阅读理解。 14-year-old Jason Morgan talks about an exciting science project. Last month I got the chance to take part in an underwater research project in an area of the Gulf of Mexico called the Flower Ga...