Set2 A Very Boring Lecture Some Tools for
Set-2 A Very Boring Lecture** Some Tools for Later ** Sorry about that
HW Assignment Read the rest of chapter 1
NOTE
The Three Tools • Scientific Notation • Graphs • Converting Units Don’t be offended if you already know this stuff. Feel free to take a nap.
An Atom ~0. 000002 Meters 9 zeros after the decimal point !!
~0. 000002 Meters Datsalottazeros! Dersgoddabeabedderway And there is!
Do you remember?
The Sequence • • • 20=1 21=2 22=4 23=8 24=16 25=32 • 1, 2, 4, 8, 16, 32, ……. Interesting but would be better if we only had one finger on Each hand!
Which is better for counting? 5 1
This works for other “bases”
Clicker: How Much Is A. B. C. D. 16 43 128 32
You use what you have … • 5 fingers on each hand. • 2 hands • Toes are inaccessible • 2 X 5 = 10 • Lets look at “base” 10
“Base” 10
Some of the numbers
{ A real number 6 Zeros Scientific Notation
What about decimals? ONE
So. . 4 places after The decimal point First non-zero digit
Powers of 10 (meters)
What’s it all about? ? Powers of 10 http: //www. youtube. com/watch? v=41 g WUk. VQ-9 U Power. Point Version also available.
Does Scientific Notation have any use in music? ?
The Path of Music
The Path of Music
The Ear ain r b “Loudness” increases with The AMPLITUDE of the Back and forth movement of the eardrum.
More on Loudness later in the semester
Let’s review graphs. • A Graph is a way of visually presenting data from a table. • It usually has two axes. These axes can be anything but in science it is often an x- and y- axis. • Sometimes a graph is three dimensional.
DJIA ($) An Important Graph 1 box = 1 month time The Dow Jones Industrial Average (CNN-money 7 -08
Another Important Graph 10 years of data – a different view! 6 mos
Last Topic in this Set UNIT CONVERSION • We need to convert days to seconds • How many seconds are there in 2 days? • What do we know? 1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds
UNITY “Days” cancel; Trick: Keep multiplying by unity!
So now you know …. if you didn’t know before. üScientific Notation üGraphs üUnit Conversions
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