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Study Guide

PHYS 190- Final Exam Guide - Comprehensive Notes for the exam ( 117 pages long!)


Department
Physics
Course Code
PHYS 190
Professor
Howard Trottier
Study Guide
Final

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SFU
PHYS 190
Final EXAM
STUDY GUIDE

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PHYS 190 - Lecture 1 - Distance Scales
“Cosmic” Distance Unit: Light-Year
1 light year - distance travelled by light in 1 year
Speed of light - 300,000 km/sec*
~10,000,000,000,000 km*
10 thousand-billion km
10 trillion km
Closest star* - Proxima Centauri
Red dwarf star
~4 light-years*
*excluding the Sun
Andromeda Galaxy
Nearest major galaxy
~2.4 million light-years away*
~100,000 light-years across with ~400 billion stars
Hubble Ultra Deep Field
Limit of observable universe ~13 billion light-years*
*universe is 13.7 billion years old
Field of view only ~1/10 width of pinkie nail at arm’s length
Scale Model of Solar System
Sun-Pluto 6 million kilometres* (scaled) → 1 kilometre model
Astronomical Unit (AU)
1 AU - Sun-Earth distance - 150 million kilometres*
Sun-Pluto distance - 40 AU*
1 light year ~50,000 AU
Scientific Notation (“Powers of Ten”)
Essential for expressing very big and very small numbers
Count factors of 10
10 = one factor of 10 = 10^1
100 = 10x10 = two factors of 10 = 10^2
1000 = 10x10x10 = three factors of 10 = 10^3
0.1 = 1/10 = one factor in denominator = 10^-1
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0.01 = 1/100 = 1/(10x10) = two factors = 10^-2
0.001 = 1/1000 = 1/(10x10x10) = 10^-3
1 = “no” factors of 10 = 10^0
1977 Film: “Powers of Ten”
Inspiring visual treatment of scientific notation
Very influential in physics education
Clearly provided inspiration for opening sequence in “Contactand for many
variations
Charles & Ray Eames
Artists & architects
Narrated by Philip Morrison, MIT physicist
Scientific knowledge spans over 40 orders of magnitude
From inside atomic nucleus to “edgeof observable universe
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