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CSE-101 Class 6 Notes


CSE-101 Class 6 Notes

CSE 101 - Class 6

Comets - Snow + ice - iron - nickel
Solar winds blow tails
Short period comet - comes around every few years
Long period comet - fly's by once

Short life comets have < 10,000 year life span
Earth goes around sun 66,000 MPH
Atmosphere acts as cushion - slows down comets debris
Friction burns the fragments up
5 per day make it to the surface
Barringer Meteor Crater, Arizona - Barringer bought it looking for nickel

Jan Ort - proposed ort cloud - shell of comets at remote frontiers of solar system - 50,000 AU away from sun
No one has ever seen Ort cloud
Inverse square law - how much pull at 50,000 AU
Pluto 39AU
Based on mathematical errors

Comets can not loose material forever

Psalms 19:1
"The heavens declare the glory of God; and the firmament sheweth his handywork."
Pslams 8:3-4
[3] When I consider thy heavens, the work of thy fingers, the moon and the stars, which thou hast ordained;
[4] What is man, that thou art mindful of him? and the son of man, that thou visitest him?
Psalms 39:3
"while I was musing the fire burned"
Muse = to think
Theist - Atheist
Amuse = to not think

Earth's magnetic field getting weaker
In 150 years it has decreased by 6%
Can not be older than 25000 years
Thomas G Barnes - magnetic reversals
Dragged equipment along bottom of ocean floor - drew line through stronger + weaker sine wave
Strong magnetic field = less carbon 14

Earth Slowing Down
1990 Added 1 second to year
Astronomy magazine 1992 - June 1st will be 1 sec longer
1953 till today add 1 second every 1 - 1.5 years
Days grow longer by 1/1000 of a second each day
Causes slow down:
1. Inside of earth liquid - not smooth inside
Mohorovicic discontinuity (The Moho)
Where magma turns to solid
Know earth has liquid core due to 2 different types of waves produced by earthquake
S + P waves - one speed through solid - one through liquid
Core may be another solid mass or hollow
2. Liquid surface
Water pushes against land - tidal breaking
3. Wind currents - Coriolis Effect
Wind blowing against mountains - sun heating air rising + falling

Billions of years ago earth moved to fast to live
Jupiter spins every 10 hours
Venus spins 224.7 days
Faster sphere spins it flattens out
4.3 BYA if earth was cooling it would have flattened pancake
Sahara desert
Prevailing winds
Hot air blows and kills trees next to it
Minerals leave ground at next rain and nothing will ever grow again
1300mi N to S
Grows 4 mi / year
Desert is approx 4000 years old
Why is largest desert not older than 4000 years?

Oil pressure - 20,000 psi
Drill 12- hole down 1000 ft - insert blow out prevention ring - drill 6- hole rest of way
Oil pressure will erode the surface if blow out prevention not in place
Rocks on top of oil could not hold oil pressure for more than 10,000 years
Why is oil still there - Where did it come from?
Oil is living organisms - pressure + heat
Garbage squeezed to oil 20 min
Hitler tried using Jews to make oil - too expensive
3800 ft under TX
Sinclair - dinosaur as symbol
Mellowed in the earth for millions of years
World full of people -animals - plants
Flood - volcanoes - mud flows - ash - rocks - lava
1 cu ft water = 62 - 64lbs
10 ft high 620 lbs / sq ft
Rocks weigh more than water - 100 lbs / sq ft
3000 ft of rocks = 300,000 psf
Oil between 3000 - 10,000 ft

Ice cores - Greenland - South Pole
10,000 ft deepest hole
Layers = summer - winter
Lost squadron - Knoxville - Middlesbrough KT
WWII planes ran out of gas - landed in Greenland
Rich guy from KT decided to go get them
Used ground penetrating radar - under 263ft of ice in 48 years
Melted down Ice to get to planes
5 1/2 ft / year - 10000ft / 5 1/2 ft / year = 8000 years
Warm day cold day rings
Varves - Ice layers
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