Our transition back will begin with an overview of heat, the lowest form of energy (random, disorder, high entropy).
We'll begin with a few labs and demos, and follow the frog book for a rough overview, before diving into our normal textbook.
ch. 12 Non renewable energy
ch. 13 Renewable energy
ch. 16 Climate change
ch. 17 Non renewable energy
ch. 18 Renewable energy
Energy overview
IR camera
Dashboard greenhouse example
Heat: lowest form of energy
Radiation: needs no medium, can be reflected (white, mirrored surfaces), more efficient at high temperatures (red hot), e.g. solar radiation from the sun to us, 8 light minutes away, through a vacuum.
Conduction: (contact), air over warm earth, picks up heat (thermal energy) by contact
Convection: (mass in motion), dependent on density differences, casue of all wind, storms, heat transfer to space
Frog book:
16: climate change
17: non renewable energy
18: renewable energy
Implications:
Building insulation
Hot water insulation
HVAC
Housing
Industry
Transportation
MLO= Mauna Loa ("long mountain") Observatory: Mauna = mountain, Loa = long
Begin in 1958, with Keeling, so the curve is called the "Keeling curve"
Look it up: why is it jagged? What does it look like in the southern hemisphere? Why?
Look up NOAA, this is the organization that oversees MLO
NCAR is another cool place to look up.
Find the aggi index graph-which gas is most important? which is changing most today? why is 1990 the 1.0 mark for all gases?
What is the difference between the aggi graph and any other climate change graph?
You might also look up the ozone and CFC graphs, notice what happened to those as well.
Heat transfer lab:
conduction, convection, radiation examples
Energy literacy lab:
1000 W water heater for 1/10 hour = 0.1 kWh
1 Watt = power
1 kW = power
1 HP = power
1 kWh = energy
1 joule = energy (recall mgh = PE, or 1/2mv^2 = KE)
1 calorie = energy (n.b. 1000 cal = 1 Cal, or food calorie)
1 BTU = energy (used in heating, ventilation and air conditioning systems-HVAC)
Energy monitoring lab:
Energy hunt
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