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# [PHYSICS 6A] - Final Exam Guide - Comprehensive Notes for the exam (90 pages long!)

Department
Physics
Course Code
PHYSICS 6A
Professor
davidschriver
Study Guide
Final

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UCLA
PHYSICS 6A
FINAL EXAM
STUDY GUIDE

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Week 0 Lecture 1 Notes
Physics
Study of the physical universe
How and why things occur the way they do
Started by people making observations, taking measurements and asking questions
Fundamental Principles
Forces: make things move and hold things together
○ Gravity
Occurs between all objects with mass
○ Electroweak
Electromagnetic + weak nuclear force
Strong nuclear
Atomic level
Energy and momentum conservation
Energy-mass relation
○ E=mc2
Physics can be used to predict the future
Possible for simple systems
projectiles, eclipses
Difficult for complex systems
earthquakes, the stock market, sporting events
Terminology
● Models
Analogy or mental image of how a particular phenomenon works
Light wave, atomic nucleus
● Theory
Detailed, quantitative description that can be tested
● Law
Concise, general statement of how nature works
Well-tested theories
Can be modified or rejected if exceptions are found
Numbers and Measurements
● Uncertainty
Depends on measuring device and process of taking measurements
Significant figures
Number of reliably known digits in a numerical value
Scientific notation
Expresses numbers in powers of 10
Useful when dealing with very small or very large numbers
SI units
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Length [L]: meter (m)
Mass [M]: kilogram (kg)
Time [T]: second (s)
Unit conversions
1.00 lb = 2.20 kg
1.00 in = 2.54 cm
find more resources at oneclass.com
find more resources at oneclass.com