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.
Flex your fins! The degree of flex from least flex to most from left to right: The Flex Fin, the Rake Fin, the Pivot Fin and the D Fin. The Flex Fin (with maximum flex) is a really versatile fin that can be used in just about anything from shorter stubbies to 10-foot nose riders.