Ch15 WavesHow do oscillations and wave relate?

Can you use oscillations and waves in a meaningful sentence?

How do you make waves?

How do you build this into a kinematic equation?

How do you visualize a wave?

Dynamics? – The Wave Equation, wave speedGeneral solution

Ch15 SuperpositionWhat is superposition?How have we used it before?What kinds of superposition/interference can waves have?

How do waves interact with a boundary?Why?

PhET – voice demo

Fourier Analysis Are there any singers in the house?

Ch15Energy, IntensityLook at the derivation of the energy, power, intensity transmitted by a wave?

• What does it depend on?• What is it proportional too?• What does it assume?• What is the wave intensity?• How does energy differ from intensity?• How does power differ from intensity?• What is the equation for intensity?

If a sound wave sounds less loud when you are farther from a speaker is energy conserved? If so, how? If not, why not?

Intensity and the Decibel scale

Ch15Waves on a StringWave pulses?Wave speed?Incident waves?Reflected waves?Transmitted waves?Resonance and standing wave patterns?

What kinds of ends/boundaries can a string have?

What wavelengths “fit” on a string? -- waves on string demo

Ch15(Standing) Waves on a StringFind the • Harmonics – normal modes• Overtones• Fundamental• Nodes• Anti-nodes

2d – Chladni plates3d – atoms

Ch15 Sound WavesWaves in a tubeThe fundamental frequencyHarmonics

What kinds of ends/boundaries can a pipe have?

What wavelengths “fit” in a pipe? – calculation

Tone qualitiesFourier analysisSound lab

Ch15 InterferenceInterference – calculation Beats – demo Doppler – demo, calculation Shock waves

Ch17Temperature and Heat

http://www.youtube.com/watch?v=Zz95_VvTxZM

Ch17Temperature: The StoryWhat is temperature?

• Macroscopic? Measurement. Units.• Microscopic? Story.

What is the “story” of temperature? Phet• What are the other characters in the story? • What is the goal in the story?• What happens if T increases?• What happens if T decreases?

How do you measure temperature?• Scales?• How is this idealized?

Thermal ExpansionSolids/Liquids• Variables?• Empirical

relationship, proportionality

• Constant• Mathematical

expression – Linear, Area, Volume

Gases• Variables?• Empirical

relationships, proportionalities

• Constant• Mathematical

expression – The Ideal Gas Law

Ch17

Ch17Heat and Specific HeatDistinguish heat, temperature, energy, pressureVisualize using a graph

• Adding heat to a solid, liquid, gas

How much energy does it take to raise water 1°C?How much energy does it take to raise aluminum 1°C?How much energy does it take to raise ice 1°C?

Ch17 CalorimetryBalancing warming, phase changes, and work

1. Hot water mixed with cold water• Limiting cases

2. Ice in water• Starting at 0°C• Staring below 0°C• Not completely melting• Freezing the water