Video: Arithmetic Logic Unit (ALU): Definition, Design & Function. An arithmetic logic unit (ALU) represents the fundamental building block of the central processing unit of a computer. An ALU is a digital circuit used to perform arithmetic and logic operations.
Snake Crawls up a Wall. 02.10.2008 - Many people ask me about the climbing capability of snakes. In particular, people want to know if snakes can get up into their attic. The answer is that yes, some species of snake are excellent climbers, and can climb walls.
The drawback, however, is that a skeleton might shoot over the wall, a creeper could explode if a player is standing near the wall and a spider could still climb over the wall. Unlike fences, if two cobblestone walls are placed one block apart diagonally, you cannot walk between them.