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.
With such a limited supply, rhodium doesn't come cheap. It is the most expensive of all precious metals, currently trading at $2,725 an ounce. (To give you a better idea of its cost, that's over twice as expensive as gold and 154 times more than silver.).