Our analysis of production and cost begins with a period economists call the short. run. Theshort run in this microeconomic context is a planning period over which the. managers of a firm must consider one or more of their factors of production as fixed.
Sharks have two sets of paired fins on the sides of their body, in the same general position as the main wings and horizontal tail wings of a plane. The shark can position these fins at different angles, changing the path of the water moving around them.
Each species of shark has a unique tail design. This has to do with the overall size of the shark as well as what the purpose of the tail is. In many instances the tail allows the shark to move very fast in the water. Other times it is to help balance the movements of the shark so that they can glide along gracefully.