Concepts of Physics
Chapters 25 & 26
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Physics Top Ten
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Updated 5.4.2008

Friday, April 11

  • Heat & Temperature Test
  • Read Chapters 25 & 26

Monday, April 14

  • Linear Expansion of Metals Lab due
  • Introduction to waves - rhythmic disturbances that carry energy through matter or space
  • Brainstorm: what travels as a wave?
  • Difference between mechanical & electromagnetic waves (show spectrum chart).
  • Intro. to Pendulum lab
  • Tuesday, April 15

    • Pendulum lab (part I)

    Wednesday, April 16

    • Pendulum lab (part II)

    Thursday, April 17 and Friday, April 18 – No school – Teacher Professional Development Day

    Monday, April 21

    • Simple harmonic motion - repetitive, regular motion with a measurable period
      • Period - time to complete one cycle (measured in seconds)
      • Frequency - number of occurances or cycles in an amount of time. Usually measured in Hertz (Hz) and is the number of cycles per second. Also know about kHz, MHz, GHz, etc.
      • What does the period of a pendulum depend on?
    • All about wave motion
      • Simple harmonic motion
      • Wave parts – crest, trough, wave pulse
      • Measuring waves – wavelength (m), amplitude, frequency (Hz), period, energy (J), speed of waves
    • Traveling waves vs. standing waves (nodes & antinodes)
    • Bow waves & shockwaves
      • Wave pulse, continuous wave, surface wave,
      • Types of waves – S waves (transverse), P waves (longitudinal)
      • Compression and rarefaction

    Tuesday, April 22

    • Wave calculations (wavelength, frequency, period, speed)
    • Interference during superposition – Constructive and destructive (with slinky)

    Wednesday, April 23

    • P. 388, 21-27 due today
    • Intro. to speed of sound lab
    • Stroboscope demo

    Thursday, April 24

    • Pendulum lab due
    • Speed of sound lab

    Friday, April 25

    • Sound is a longitudinal traveling wave, usually in air. Speed of sound in air is 331 m/s and increases by 0.6 m/s for every 1°C.
    • Video: ESPN Doppler Effect
    • Doppler effect (apparent shift in frequency with changes in velocity)
      • Doppler radar, dopper effect DVD demonstration, red/blue shift in stars (Hubble constant) Hubble images | a Doppler physlet | Hubble constant graphs
      • Sonar in bats, some radar guns
      • applications of the doppler effect - star distances, speed enforcement, weather radar
    • Speed of sound vs. speed of light
      • How long does it take for sound and light to travel to you when lightning strikes 10 km (6.2 mi) away?

    Monday, April 28

    • Speed of Sound Lab due
    • Finish Doppler Effect info. (do dvd demo)
    • Singing rod demos
    • bell in a vacuum jar (matter waves require matter)
    • Interference & noise cancellation (BOSE noise cancelling headsets)
    • DVD Demos: Disc 9; #9–19, 24–30
    • Timbre: Vernier microphone - show different waveforms for
      • rotary and touch tone telephones
      • pure tones from signal generator
      • keyboard notes (fundamentals and overtones) - accompanying PowerPoint slides

    Tuesday, April 29 – No class due to PSSA testing –12th graders report to E–Large

    Wednesday, April 30 – 2nd period after 5th/lunch today due to PSSAs

    • P. 388, 36–39 due today
    • Go over problems in class
    • Range of hearing with sound generator and speakers
    • Work on study guide

    Thursday, May 1

    • Video: ESPN How Sweet it is
    • 1st period - infrasonic, ultrasonic
    • Sound level meter and the decibel scale
      • P. 394 table of loudnesses
    • orange & green swinging pipe thingy (five tones - do with Vernier microphone)
    • Bats: size of sweet spot on Al vs. wood bats, ease of hitting with bat types

    Friday, May 2

    • Waves and Sound Study Guide due
    • Go over study guide; more DVD demonstrations
    • Next time questions

    Monday, May 5

    • Waves and Sound Test
    • Read Chapter 26