X Phys 1401 Pre Lab 12 Sound Wave Basics Go To The Sound Simulation And Run Note If You Are Having Issues Getting 1 (49.05 KiB) Viewed 29 times
X Phys 1401 Pre Lab 12 Sound Wave Basics Go To The Sound Simulation And Run Note If You Are Having Issues Getting 2 (41.37 KiB) Viewed 29 times
X Phys 1401 Pre-Lab #12 - Sound Wave Basics Go to the Sound simulation and run. (NOTE: If you are having issues getting the PhET Simulation to fun, try following these directions: First, download Java to your PC. Then click on the "coffee cup" in the bottom right corner of the simulation image on the PhET website. It will either do a "save as" or "Save as and run." If it does not automatically open, open the folder to where you downloaded it (simulation), right-click and choose "Open with..."Java. If Java is not listed, you will have to find where Java is located. You will get a security message that will pop up. Choose "R" or "Open" This ought to work IF YOU EXPERIENCE ISSUES WITH GETTING A PRET SIM TO WORK, go to the PhET Help Center. Also, when trying to open a PhET sim, you may get a virus warning, especially on Apple devices. Please know the sim files ARE NOT nor do they contain viral code. They are perfectly safe to open.) Answer the following questions, grouped by the tab name in the sim. Part I. Listen to a Single Source. Observe the sound waves coming from the speaker. 1. What do the dark and light bands represent? (Remember, sound waves are longitudinal waves.) answer 2. Why do the waves get lighter with distance from the speaker? answer! 3. How does changing the (a) frequency and (b) amplitude affect the depiction of the sound waves in the sim? (a) answer (b) (answer 4. How do you think changing the (a) frequency and (b) amplitude will affect the sound heard by the listener? (a) /work/ (b) answer Part II. Measure Press "start" and move the ruler to the center of the speaker. 5. Look at the stopwatch. What do you notice that is strange about it? answer 6. Why do you think it is programmed this way? answer 7. Describe how you would find the frequency of a wave if the frequency slider did not have a number display. answer 8. (a) Test your idea with a variety of waves (record them in the generic data table below), and (b) describe how well your procedure gives results that match the frequency display (a) Hint: Don't forget to label your columns or rows wer/w/www/
(b) (answer) 9. Describe how you would find the period of a wave without using the frequency information. (answer] 10. Measure the distance a wave travels in a certain amount of time. Use the data table below, doing at least 3 trials. Find the speed of sound using v=d/t. Trial Distance traveled, d (m) Elapsed Time, t () Speed, v=d/t (m/s) answer answer answer 1 2 3 11. Use the ruler to measure the wavelength of these sound waves (from the previous question). Record the wavelength and frequency in the data table below. Check the speed calculated above using v=f?. Trial Frequency S (Hz) Wavelength, I (m) Speed, v = f(m/s) answer answer answer 1 2 Part III. Two-Source Interference Observe the interference pattern made by the sound waves coming from two speakers. 12. Describe what is happening with the waves where you see white spots, dark spots, and gray spots. Gray spots: [answer] Dark spots: answer] Gray spots: answer]
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