1. Oscilloscope Lab Seeing and Hearing waves

2. Sound Waves Sound can travel at different velocities through the same medium (air for example). Different temperatures changes the density of the molecules of the medium

3. Temperature Conversion T C = 5/9(T F – 32) – What is the temperature in °C if the room is 72 °F? – What is the melting point of water in °C? T F = 9/5 T C + 32 – What is the temperature in °F if the room is 22°C – What is the boiling point of water in °F?

4. Velocity of Sound Formula v S = 331 m/s + [0.6 m/s/°C 20 °C] What is the velocity of sound in a room that is 30 °C? What is the velocity of sound in a room that is 85 °F?

5. Wave Formula Wave Velocity = wavelength x frequency v = λ x f λ = V / f f = v / λ

6. http://www.physics-chemistry-interactive-flash- animation.com/electricity_electromagnetism_interactive/oscilloscope_description_tutorial_sounds_frequency.htm Key NumberVelocity (m/s)Frequency (Hz)Wavelength (m)

7. Type of Sound The auditory sound for humans is 20 Hz – 20,000 Hz – Sound that cannot be heard because of too low of frequency is Infrasonic or Subsonic – Sound that cannot be heard because of too high of frequency ultrasonic