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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?
Transverse and longitudinal 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?
- 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.