Download September 8, 1998

September 8, 1998
Comments:
• Email… fears and concerns
• Phone/Fax in office 887• Pre-Test problems
The BIG BANG……..
That first second… E = m c2
Energy to Quarks
charges +2/3 and -1/3
Strong Force acts ≤ 10 -15 meters
September 8, 1998
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Formation of Protons, Neutrons,
Particles and Anti-particles
Formation of Electrons and Positrons
Electrical Forces F = k Q q / r2
Formation of Atoms & Molecules
Gravitational Forces F = G M m / r2
Formation of Quasars, Galaxies, Solar
(Polymer Fun)
September 8, 1998
Evidences for what we know…
Telescopes… Existence of galaxies..
velocities , expansion, age
Accelerators… elementary particles,
energies, bonds, quarks
Sizes of small spaces…
10-18 -- 10-15 -- 10-10 m
Filling Empty Space
Shrinking the Earth
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September 8, 1998
About how many neutrons COULD
fit within the volume occupied by
one atom?
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10-10m
_______________
10-10m
10-15m
10-10m
September 8, 1998
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Models of the Universe…the “Laws of Nature”
Earth Centered… Aristotle, Ptolemy
Earth, Water, Air, Fire.. Falling
Cycles in cycles
Sun Centered… Coepernicus,
Kepler’s Empirical Laws
Ellipses, Areas, Periods
Galileo’s Experimental Laws
Inertia, Falling
September 8, 1998
Motion of Objects in Gravitational Field
Cone Cuts
Curved Space
Motions in Our Solar System
Sun, Earth Moon Periods
Sun around galaxy
Stars around earth...
Earth around sun, spin, seasons
Phases of moon, planets
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September 8, 1998
1 light year = 3 x 10^8 meter/sec x1 year x
365 day/year x 24 hour/day x
60 min/hr x 60 sec/min
= 9.5 x 10^15 meters
= 9,500,000,000,000,000 meters
Nearest star = 4.3 light years
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Strong….Electro-weak….Electricity…. Gravity
Quasars…
1010 ly away
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Stars & Galaxies…
4 - 4x108 ly away
Earth
Light Cone
Big
Now
---------------------15 Billion Years--------------------Bang