For example, if the ball lies on a cart path, the ball must be dropped at a point where the cart path does not interfere with the lie of the ball, his stance, and also the area of intended swing. If the ball comes to rest in such a position, it must be re-dropped (Rule 20-2c(v)).
Rhodium is a silvery-white transition metal that holds the distinction of being the world's most expensive precious metal. It has an atomic number of 45 and is about as nonreactive as gold. The only way to dissolve rhodium is with sulfuric acid.
Neodymium - This material is capable of storing the most magnetic energy, and produces the strongest magnets. It is a blend of iron, boron and the rare earth element, neodymium. Commercial gauss ratings are typically 10,800 to 12,300 gauss. Therion products use ultra-high grade neodymium magnets, rated at 13,800 gauss.