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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
find more resources at oneclass.com
find more resources at oneclass.com