Energy Degradation Energy Review: Energy is always conserved
Law of Conservation of Energy However, energy becomes less useful
(more entropy) - 2 nd Law of Thermodynamics Energy Degradation is
the process of energy changing into forms that no longer can be
used to perform mechanical work.
Slide 3
Sankey diagram Visual representation of the energy flow of a
system. Width of each arrow is proportional to amount of the energy
that part of the system carries.
http://bioage.typepad.com/photos/uncategorized/energy_path_gasoline_ice.png
http://the energy carried by that
www.bbc.co.uk/schools/gcsebitesize/science/images/ph_energyfuel.gif
Energy Sources Early Civilization food and sunlight only energy
sources. Energy Consumption per person 8MJ/day Modern Civilization
energy used for all aspects of life. Energy Consumption per person
300MJ/day or 3.5 kW / day US 10 kW/day contrasting with parts of
Africa
