Set-2 A Very Boring Lecture ** Some Tools for Later ** Sorry about that

HW Assignment Read the rest of chapter 1

NOTENOTE

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 ~ Meters 9 zeros after the decimal point !!

Datsalottazeros!Datsalottazeros! Dersgoddabeabedderway ~ Meters And there is!

Do you remember?

The Sequence 2 0 =1 2 1 =2 2 2 =4 2 3 =8 2 4 = =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.16 B.4 3 C.128 D.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 Scientific Notation { 6 Zeros

What about decimals? ONE

So.. 4 places after The decimal point First non-zero digit

Powers of 10 (meters)

What’s it all about?? WUkVQ-9U PowerPoint Version also available. Powers of 10

Does Scientific Notation have any use in music??

The Path of Music

The Ear “Loudness” increases with The AMPLITUDE of the Back and forth movement of the eardrum. brain

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.

An Important Graph The Dow Jones Industrial Average (CNN-money 7-08 time 1 box = 1 month DJIA ($)

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

“Days” cancel ; Trick: Keep multiplying by unity! UNITY

So now you know ….if you didn’t know before. Scientific Notation Graphs Unit Conversions