Fall wk 9 – Mon.29.Nov.04 • Welcome, roll, questions, announcements • Review our work this quarter • Looking ahead – next quarter • Portfolio and self-eval workshop • Looking ahead – this week Energy Systems, EJZ Seminar motivates science learning Questions/problems: • Are we running out of oil? • Are carbon-based fuels hurting health and environment? • Are greenhouse gases warming the Earth? Solutions? • Alternate fuels for cars; mass transport systems • Nuclear or renewables for electricity • H fuel cells? Energy and Power What types of energy have we learned about? Energy transformations Ex: Sun warm Earth’s water weather storms, wind power electricity toaster oven Energy systems Ex: LNG to Evergreen burn in boilers steam heat rooms relaxed or alert students learning Equilibria and oscillations Equilibria where F=0 or U=flat. Countless natural systems oscillate in approximate U ~ x2 wells. Energy comparisons Energy comparisons Energy data http://hyperphysics.phy-astr.gsu.edu/hbase/gaseng.html Calculus facilitates richer analyses Three basic approaches to math problems: • Graphing (sketching relationships) • Numerical approximations (calculators & computers) • Analysis: exact solutions (algebra, trig, calculus) Differentiation: • Slope = derivative = rate of change • Calculus invented for physics, e.g. variable forces • Polynomials: d x p p x p 1 Trig: d sin( x) cos( x) dx dx Your research projects go deeper In a series of workshops, independently, and with your team, you have by now: • Articulated a question you want to investigate • Proposed several different hypotheses to possibly answer your question • Researched articles and books on your question • Planned how to test your hypotheses Next quarter, you will carry out your research. Research presentations tomorrow Looking ahead – next quarter Electromagnetism: • How is electrical power generated and transmitted? • Light, spectra, and quantum mechanics Sun, Earth, and Climate: • Earth’s climate and weather • Effects of solar storms on Earth • Role of the Sun in climate change We can use calculus to do more realistic physics now! Calculus in winter quarter Using differentiation: • Optimization: what is the most efficient relationship? • Exponentials and logs: calculating changes in growth • Electromagnetism satisfies wave equation! (Maxwell) Integration: • Inverse of differentiation (Ex: velocityacceleration) • Calculate totals for changing phenomena • Electromagnetism: Changing magnetic fields create electric fields (induction) Portfolio and self-eval workshop Let’s look at the guidelines linked to our homepage, and the pink worksheet Your portfolio: sections and paragraphs Your self-evaluation • Start with your eval prep sheet • Integrate with your paragraphs • Choose one or two good examples to DEMONSTRATE your learning Looking ahead – this week Tuesday: • Research presentations Wednesday: • Post your research exam Q on WebX Thursday: • Homework due, questions answered • Get your final exam in class • Potluck? Friday: written exams due by 2:00 Next Monday: inQsit ESfinalQuiz due by 10 am