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Dampened, Driven Oscillators

CHAPTER 2: WAVES AND SOUND

wave:

  1. disturbance within a medium
  2. Transfers energy with no net motion of matter
  1. Exception: electromagnetic waves (aka, light) need no medium

2 types of waves

Ex. Earthquakes (seismic waves)

        s-waves : transverse (only through solids)

        p- waves : longitudinal (through solids and liquids)

Wavelength

A useful equation:

        want relationship for velocity

d = λ (wavelength)                        and        

t = T (period)

Therefore:

        

        

Ex. Sound waves

        At normal temperatures and pressures

        v = 340 m/s = 760 mph (note: v is independent of f and λ)

Ex: Pitches