A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory. A cache is a smaller, faster memory, closer to a processor core, which stores copies of the data from frequently used main memory locations.
It takes approximately 31 empty aluminum cans to equal 1 pound. As of 2014, the average weight of an empty aluminum can is 14.9 grams.
It depends upon the state in which you are redeeming. Some states are by weight, some are by can. For instance, in California, each can is worth 5 cents. In this case, you would need 20 cans to equal a dollar.