Fall wk 3 – Thus.14.Oct.04 Welcome, roll, questions Josh Skov break Calculus Ch.1 and Physics Ch.18 Looking ahead Energy Systems, EJZ.

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Presentation transcript:

Fall wk 3 – Thus.14.Oct.04 Welcome, roll, questions Josh Skov break Calculus Ch.1 and Physics Ch.18 Looking ahead Energy Systems, EJZ

Welcome Josh Skov Sustainability guru Greener by association The Good Company (details on our research webpage How to measure sustainability indicators on campus?

Finish Physics Ch.18 Key points? Insights from team discussion? Questions? Review of heating Gas cycles and work

Energy and heat - review 1. Which are not units of Energy? A.Joules B. ergs C. Kilowatt-hr D. Watts 2. Which is a bigger temperature change? A.  T = 1°FB.  T = 1°F 3.How does the temperature of water change as it freezes? A. Gets colder B. unchanged C. Gets warmer

Energy and heat - review Match each heat transfer mechanism to its medium: A.Conduction1. Photons B. Convection2. Solids in contact C. Radiation3. Flowing fluid

Heat, energy, work - review Heat required to raise the temperature of a substance: Q = m c  T Heat required to change state: Q = m L Work done by (or on a gas) = area under P(V) curve Practice: Problem # 27, 29, 32, 33

Heat, energy, work - new Gas cycle: Heat in = Work done + internal energy Q = W + E Electric Power = Voltage * Current: P = VI (p.695) Ohm’s law: Voltage = Current * Resistance: V = IR Radiation: P rad =  A T 4 Practice Problems: Ch.18 # 94, 52, Ch.26 # 43(a)

Phys 18 HW Thermal (and basic) physics problems due this Thus: Ch.1 #5, 7, 16, 18, 24, 26, 29 Ch.18 #4, 5, (24), 26, 28, 35, (73, 85) Problems in (parentheses) are not available on eGrade. Hand them in separately? I will post solutions after class Thus. Phys 18 HW 2 due next Thus: Ch.18 # (27), 29, 32, 33, (94), 52

PSE bill

Finish Calculus Ch.1 PIQ Trigonometry review Polynomials

Calc 1 HW # 1, 2, 9, 11, 14, 18, 26, # 2, 4, 14, 28 Next Thus: Calc 1 HW # 1, 10, 14, 16, 20, 29, 31, 34, # 8, 18, 23

Looking ahead Seminar in Sem II C2109 tonight Please put your team’s best Q on the board before 5:00 Friday: Weekly energy essay due Next week: –Monday: Clean Energy Fair- Sem II courtyard Telescope: noon between Lab I and LabII 3:00 – class will go hear speaker –Tuesday: Biodiesel debate –Tutor on Wed.1-3 and Fri.10-12

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