5/7/10

Post date: May 07, 2010 7:54:2 PM

Bell Ringer: Why do the lasers (reflected off a speaker) move around so much? What does a speaker do to create sound?

    • Introduction to Sound

      • Laser-speaker demo

      • 15.1 Notes

  • Homework from Page 325-326

    • AC: 1, 5

    • Problems: 5, 8, 11, 12

      • 5. 0.0175 sec

      • 8. 5,150 m/sec

      • 11.a) 340 Hz b) 360 Hz

      • 12.a) 280 Hz b) 260 Hz