bicycle 101 the basic principle, as simply as possible
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Bicycle 101
Bicycle 101
The basic principle, as simply as possible
Bicycle 101
1866 – Pierre Lallement invents the Velocipede
A historical perspective
Bicycle 101
Angular momentumL = m v r
Key facts
Bicycle 101
Importance of acting like a cyclist
Bicycle 101The seven steps of the bicycle method
1. Determine the direction you wish to go
2. Determine whether there is a paved surface
3. Point the bicycle in the proper direction
4. Pedal furiously
5. Determine how far you have moved
6. Determine what change in direction is required
7. Call a cab
Easily learned steps of the method
Bicycle 101
Bicycle 101
???
Bicycle 101
Bicycle 101
Bicycle 101Science 101
Science 101
Science 101
The Lives of the Scientist
The Lives of the Scientist
Science 101Our role
Science 101Our role
But once you learn it…
it's yours for life
A process,...
not a body of facts
Science 101Our role
Importance of visualization in science
Importance of visualization in science
Visualizing Energy
Visualizing Energy
Visualizing Energy
High Energy State
Low Energy State
High Energy State
Visualizing Energy
(cheap refrigerator
magnet)
Low Energy State
High Energy State
Visualizing Energy
(cheap refrigerator
magnet)
Low Energy State
Visualizing Energy
High Energy State
Low Energy State
Visualizing Energy
High Energy State
Low Energy State
High Energy State
Visualizing Energy
Low Energy State
High Energy State
Visualizing Energy
Low Energy State
Visualizing Energy
Visualizing Energy
High Energy State
Low Energy State
Visualizing Energy
High Energy State
Low Energy State
What are the components?
…for other forms of energy?
Visualizing Chemical EnergyLife: The play of water
Water: The play of oxygen
HH
O
H2O
Eight electrons
Visualizing Chemical EnergyLife: The play of water
Water: The play of oxygen
HH
O
H2O
-++
Low Energy State
Eight electrons
Visualizing Chemical Energy
HH
O
H2O
-++
Low Energy State
O2
H2 H2
High Energy State
Visualizing Chemical Energy
HH
O
H2O
-++
Low Energy State
O2
H2 H2
High Energy State
Visualizing Chemical Energy
HH
O
H2O
-++
Low Energy State
O2
High Energy State
Visualizing Chemical Energy
HH
O
H2O
-++
Low Energy State
O2
High Energy State
H2 H2
Visualizing Photosynthesis
Visualizing Photosynthesis
Low Energy State
How can light be put to work?*
Visualizing Photosynthesis
http://www.bsharp.org/physics/swings
Visualizing PhotosynthesisSympathetic vibration - resonance
http://www.bsharp.org/physics/swings
Visualizing PhotosynthesisSympathetic vibration - resonance
0 0 0
Visualizing PhotosynthesisSympathetic vibration - resonance
Distance from you
Force on swing
Push at same frequency
Transfer of energy through resonance...if frequencies match
Time
Visualizing PhotosynthesisSympathetic vibration - resonance
Distance from you
Force on swing
Force on swing
Force on swing
Push at same frequency
Push at twice frequency
Push at half frequency
Visualizing PhotosynthesisSympathetic vibration - resonance
Press silentlyBang then let go
Transfer of energy through resonance...if frequencies match
Visualizing PhotosynthesisSympathetic vibration - resonance
Infrared(low frequency,
low energy)
(high frequency,
high energy)
Ultraviolet
Transfer of energy through resonance...if frequencies match
Visualizing PhotosynthesisSympathetic vibration - resonance
Transfer of energy through resonance...if frequencies match
Which color light will be absorbed (put to use)?
Chlorophyll
Visualizing PhotosynthesisSympathetic vibration - resonance
Transfer of energy through resonance...if frequencies match
Which color light will be absorbed (put to use)?
Carotenoids
Low Energy State
Visualizing Photosynthesis
Visualizing Photosynthesis
High Energy State
Low Energy State
Visualizing Photosynthesis
High Energy State
Low Energy State
Visualizing Photosynthesis
High Energy State
Low Energy State CO2
Glucose
Fate of glucose?
Visualizing Photosynthesis
High Energy State
Low Energy State Fate of chlorophyll?
HH
O
H2O
-++
Not as Low Energy State
Visualizing Photosynthesis
High Energy State
Low Energy State Fate of chlorophyll?
HH
O
H2O
-++
Not as Low Energy State
O2
Visualizing Photosynthesis
Visualizing Human Photosynthesis
Jeff ElhaiCenter for the Study of Biological Complexity
Virginia Commonwealth University
[email protected]://www.people.vcu.edu/~elhaij
804-828-0794