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Transcript of E Lecture
is the ability to do work!
(and work is a force applied over a distance)
(KE + PE) = Mechanical
from the motion of particles)
from breaking chemical bonds or
stored by making new bonds)
nergy travels in waves (but not like ocean waves)
across the universe
(electric charges in motion are KE, stored charges are PE)
nuclei splitting up (fission)or
hooking up (fusion)
either way mass -->
PE: Position & shape
[Note: GPE = w*h]
now it gets interesting
Swamps --> Instagram
2 Laws of
now it gets R
1st Law - energy is an adolescent
2nd Law - conversions are HOT
Sunlight + CO2 + H2O = Glucose + O2
Glucose + Oxygen = CO2 + H2O +
Methane + Oxygen = Heat + CO2 + H2O
lots of "types of light"
2009 U.S. Energy Use
"I have not failed, I've just found 10,000 ways that won't work." - Thomas Edison
2012 U.S. Energy Use
photo by Zen Sutherland 10/28/07
Global Energy Use
Units = Joules (J)...a push of 1 Newton over 1 meter
lectrical Power Unit = Watt (W)...using one joule of energy in one second
"Now I have become death, the destroyer of worlds." -Robert Oppenheimer from the Bhagavad Gita
Lots of thermal energy!!
Only a little bit of thermal energy.
Note: No thermal energy exists at 'absolute zero' (-273 C).
Lake Julian Power Plant...Thermal
Our world at night.
for the information age.
An Electromagnetic House!
KE: velocity and mass, but
velocity > mass
nergy cannot be created or destroyed. It is conserved!
nergy is "lost" as heat every time energy changes form.
2050 U.S. Energy Use