Many systems are piecewise linear. That is, over a large range of variable values, the system can be described linearly. A system with amplifier saturation is one such example. Given the differential equation d2x dt2 17 dx dt 50x fx assume that f(x) is as shown in Figure P2.34. Write the differential equation for each of the following ranges of x: [Section: 2.10] a. < x < 3 b. 3 < x < 3 c. 3 < x

Tuesday, September 6, y Vocabulary Ideas Brief Introduction to Macroeconomics Economics: The study of choice made amount our many wants, with our limited resources Scarcity: When wants exceed the availability of the resources that re available. • Characteristics of scarcity: All humans face scarcity, no matter if you are rich or poor. Scarcity can never be eliminated What would the world be like if there was no scarcity • If there was no scarcity, there would be no competition or relevance of time. • There would be no scarcity of knowledge or skills, which would lead to an extinction of specialization and stand out individuals because everyone could know what the