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## week 1 notes

by: Mary-elizabeth Notetaker

16

1

3

# week 1 notes Phys 222

Mary-elizabeth Notetaker
U of L

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week 1 notes
COURSE
Fundamentals of Physics II
PROF.
Dr. Ming Yu
TYPE
Class Notes
PAGES
3
WORDS
CONCEPTS
Physics, phys222, FundamentalsOfPhysics
KARMA
25 ?

## Popular in Physics

This 3 page Class Notes was uploaded by Mary-elizabeth Notetaker on Sunday August 28, 2016. The Class Notes belongs to Phys 222 at University of Louisville taught by Dr. Ming Yu in Fall 2016. Since its upload, it has received 16 views. For similar materials see Fundamentals of Physics II in Physics at University of Louisville.

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Date Created: 08/28/16
• Applications of basic vector Vector decomposition: ex) ex) • Applications of trig Deﬁnition: Insert proof from bb slide Std ids: • More vector apps 2 types of vector products: dot product(scalar): cross products(vector): Triangle abc:AB=ACcos =AC sin BC=ACsin =ACcos AD=ABcos =ABsin ABsin =ABcos Law of cosines a =B +c -2bccos b =a +c -2accos c =a +b -2abcos Circle area Sphere area Triangle area • Electricity: Electric potential- capacity of electric ﬁeld to do work on electric charge Electromagnets- electric currents generate magnetic ﬁelds,and changing magnetic ﬁelds generate electric currents Electric charges are quantinized q=ne n is an integer e is unit charge...1.6 X 10 C Electric wires are conductors- electrons move freely in response to electric force and charge distributes evenly ex)copper,aluminum,silver to charge: conduction(contact) "charging by conduction"- object being charged is always left w same charge as object that did charging induction(no contact) if neg rod touched uncharged sphere,electrons redistribute in sphere if grounded wire is connected,some electrons will leave thru wire if it is removed,sphere will be left w positive charge that will redistribute if rod is then removed, rubber materials covering them are insulators - electrons don't move freely to charge: if you rub an insulator,only the rubbed area becomes charged polarize Semiconductors- silicone/germanium

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