A windmill has an approach velocity V1 = 24 mph (35.3 ft/s)and a blade diameter of 100 ft. The blade rotates at 15 rpm. FigureP12.51 shows a blade cross-sectional profile and the velocity diagrams for a short section of the blade at a radius of r = 25.0 ft.The outlet relative velocity W2 is tangent to the blade at the outletso 2 = 2 = 30. The air density is constant as it flows over theblade. Assume that the flow area for the mass flow rate that interactswith this short section of the blade is the same upstream anddownstream of the blade (i.e., A1 = A2). Find the velocity diagramdownstream of the blade by finding U, W2, V2, and 2.
Review of Chapter 1. Comparative politics is the study and comparison of domestic politics across countries. Looks at the politics inside countries. International relations, relations between countries. The two overlap in ethnic conflict. Institutions, organizations or activities that are selfperpetuating and valued for their own sake. They lay out rules, norms and structures in which we live. Politics, struggle for power, to make decisions for others, struggle for leadership and power in a political party, elected office, a city, region or country. Power, ability to influence others or impose one’s will on them. Inductive reasoning, examining a country closely may lead to form hypotheses about why a country operates as it does. How we go from studying a case to generating a hypothesis. Deductive reasoning, starting with a puzzle and from there generating some hypothesis about cause and effect to test against several cases. Inductive starts with the evidence as a way too undercover a hypothesis, while deductive starts with the hypothesis and then seeks out the evidence. Correlation, apparent association between certain factors and variables. Causal relationship, if we find cause and effect. Multiclausal, many variables are tied together to produce outcomes. Variables are interconnected and interact. Problems in Comparative Research, 1 Controlling many variables. 2 Controlling for the interaction of variables (Multiclausal). 3 Limited number of cases to research. 4 Limited access to information from cases.
