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: velocityacceleration)
• 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