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SCIN 233 Physics Lab 6 Sound Waves

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SCIN 233 Physics Lab 6 Sound Waves

I have the first part. just need part 2 with the simulation and calculations

Physics Lab 6 Sound Waves
Go to http://phet.colorado.edu/en/simulation/sound.
Run the simulation.
1. Observe the sound waves coming from the speaker.
a) What do the dark and light bands represent? (Remember, sound waves are
longitudinal waves.)
-They represent the high and low pressures of the sound waves.
b) Why do the waves get lighter with distance from the speaker?
-Because as the waves get further away from the source, their intensity
diminishes.
c) How does changing the frequency and amplitude affect the depiction of the
sound waves in the simulation?
-This changes the distance between each wave. Slower freq. means more
distance, higher freq. means less distance.
d) How do you think changing the frequency and amplitude affect the sound
heard by the listener?
-Amplitude will affect how loud the listener hears the sound and freq. will
change the sound itself, higher freqs. Mean higher pitched sounds while
lower freqs. Mean lower pitched sounds.
2. Press “start” and move the ruler to the center of the speaker.
a) Describe how you would find the frequency of a wave if the frequency slider
did not have a number display. Test your idea with a variety of waves (record
them in a data table) and describe how well your procedure gives results that
match the frequency display.
b) Describe how you would find the period of a wave without using the frequency
information. Test your idea with a variety of waves and record your
experiment in a data table. Check your method by calculating the period
using the frequency (T = 1/f). Show calculations.
c) Hit stop and reset, and measure the distance a wave travels in a certain amount
of time. Make a data table and do at least 3 trials. Find the speed of sound
using v = d/t.