2-7 Assessment

1) Lab

Download the following document and complete the lab:

    You will need the following materials:
    - Computer
    - Microsoft Word or a similar program
    - Vernier LabPro unit
    - LoggerPro
    - Electronic keyboard
    - Microphone
    - Tuning fork 
    - Banger
    - Optional: other instruments, sound makers, voice, etc.

    Also, you will need to know the definitions for the following terms: 
    - Vertical Axis
    - Horizontal Axis
    - Sinusoidal 
    - Equation for finding percent error.

Taken from: ^[1]

2) Journal

Now that we have completed our second unit we are to reflect on what we have learned. Please go to the discussion area and answer the following questions. Your answer should be approximately 100-200 words. Also, please read through some of the other journal posts and comment on any areas where you are able to add new insight.

   Journal Questions:
   1- Can you explain in physic terms what happens when two instruments are being played at the same time?  Your answer should include a
   description of sound waves, interference, and superposition. 
   2- Do you feel comfortable explaining the process of tuning using physic terms? 
   3- Are there any areas which are confusing you?  If so, what in particular?
   4- What do you look forward to learning more about?
   5- How do you plan on using this information in your musical career?

Talk:Journal Unit 2 Periodic Motion and Waves

3) Practice Questions for Unit 2:

1. The word "superposition" simply means

(a) algebraic sum

(b) constructive interference

(c) mode of vibrations

(d) none of the above

2-7: 1 SEE ANSWER

2. Do musical instruments produce simple or complex tones?

2-7: 2 SEE ANSWER

3. A string is 0.80 m long. It is fastened securely at both ends: at x = 0m and x = 0.80 m.

(a) Are the points x = 0m and x = 0.80m vibrational nodes or vibrational antinodes?