Waves and sound lab


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    We will have several days to complete this lab, so don't panic. You may do these segments in any order, in groups of two or less (no mega-groups).

    Speed of sound:
    • Using the water tubes, measure the resonant length for three different frequency tuning forks.
    • Calculate the speed of sound for each
    • Average these
    • Question: what would happen to the wavelength if the temperature rose?
    Standing waves:
    • Using the slender springs, create a standing wave a few meters apart. Notice the frequency.
    • Send a pulse along this stretched spring and measure the time it takes to travel from one end out and back. Calculate the velocity of the pulse.
    • Using this velocity and the distance apart, predict the frequency you would need to shake the end to create a single standing wave.
    • Repeat this for a double standing wave.
    • Question: Otis is sitting on a dock in the bay (ha ha ha). He notices waves that are 10 meters apart. If these waves are traveling at 2 m/s, what is their frequency?
    Transverse and longitudinal waves:
    • Using the slinky, create a longitudinal wave pulse. Notice the time it takes to reach the other end.
    • Calculate the longitudinal velocity of this wave.
    • Using the same slinky, the same distance apart, calculate the velocity of a transverse wave.
    • Are these similar or different?
    • Question: longitudinal waves can go through solids or liquids. Transverse waves can only go through solids (ocean waves are a different case). Look up seismology online and find out how scientists know that parts of the earth are solid and others liquid.