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.
Free climbing means using one's hands and feet to ascend a rock's natural features, employing ropes and other gear only to stop a fall. At roughly 3,000 feet (915 meters) tall, the Dawn Wall comprises 32 pitchesâor 32 rope-lengthsâof climbing. Caldwell's and Jorgeson's goal was to free climb all 32 pitchesâwithout falling and without returning to the ground in between.