Welcome to PHYS/MUS 102, Spring 2014

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# Welcome to PHYS/MUS 102, Spring 2014 - PowerPoint PPT Presentation

Welcome to PHYS/MUS 102, Spring 2014. Today’s Schedule. 9-10:15( ish ) Syllabus + Intro Stuff Lecture: Simple Harmonic Motion 10:15( ish ) – 10:30 Quick stretch/restroom break. 10:30-11:00 Intro to Lab Equip (meet in Howe 204). 11am-2 pm

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Presentation Transcript
Today’s Schedule

9-10:15(ish)

Syllabus + Intro Stuff

Lecture: Simple Harmonic Motion

10:15(ish) – 10:30

Quick stretch/restroom break.

10:30-11:00

Intro to Lab Equip (meet in Howe 204).

11am-2 pm

Do experiment (take lunch whenever you wish)

2-3 pm

Help with lab reports (optional)

Introductions
• Name
• Hometown
• Major and class year
• Music background
• What’s on your playlist at the moment
• One fun/random fact
Quotable Quotes

Life without playing music is inconceivable for me.

-Albert Einstein

Image credit: http://www.stumbleupon.com/stumbler/MamaJS/reviews/

Quotable Quotes

To stop the flow of music would be like the stopping of time itself, incredible and inconceivable.

-Aaron Copland

Questions to ponder:
• What is music?
• How would you define it in physical terms?

Harmonic Analysis

Pure listening

pleasure: Auditorium design

Sound waves/vibrations

Ferris Wheel Problem

You and a friend are riding the Ferris wheel. How would you plot your height above the ground vs time as the ferris wheel turns? The wheel has a radius of 20m, and you complete one trip around the wheel every two minutes.

Height (m)

Time (min)

1

2

5

3

4

Simple Harmonic Motion: Basic Definitions

A = amplitude

T = period

f = 1/T = frequency

x(t) = displacement/position as a function of time

x(t)

Diving Board Oscillations

Analogy of diving board in musical setting = ?

Transient Decay

Musical note “dies out”

Zoomed in (17 msec)

t

Decay time: where amplitude of signal drops to e-1of the max amplitude = ~37% of max amplitude

Lab Reports
• Introduction: what you are studying and why
• Methods: what you did and how it works-- theory and techniques described in detail
• Results: what you observed
• Discussion: what it all means