1-10 Assessment

1) Lab

Download the following document and complete the lab:

File:Slinky Lab.pdf

    You will need the following materials:
    - Slinky
    - Ruler (centimeters and meters)
    - Masking tape
    - Stop watch

Taken from:

2) Journal

Now that we have completed our first 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- Prior to this course what did you know about the production of sound?
    2- What did you find most surprising about the transfer of sound via sound waves?
    3- Are there any areas which are confusing you?  If so, what in particular?
    4- What do you look forward learning more about?
    5- How do you plan on using this information in your musical career?

Talk:Journal Unit 1 Periodic Motion and Waves

3) Practice Questions for Unit 1:

1. All periodic motion is simple harmonic motion.

(a) True

(b) False

1-10: 1 SEE ANSWER

2. All simple harmonic motion is periodic.

(a) True

(b) False

1-10: 2 SEE ANSWER

3. A mass is attached to a spring and the system is allowed to perform simple harmonic motion at its natural frequency. The mass is then replaced by one of greater magnitude. The period of oscillation will:

(a) increase

(b) decrease

(c) remain the same

1-10: 3 SEE ANSWER

4. A simple harmonic oscillator has a period of 0.002273 seconds. What is the frequency of the oscillator?

1-10: 4 SEE ANSWER

5. The force law (f=-ky) means that the larger the displacement from equilibrium (y), the larger the restoring force (F). Forced is expressed in units of Newtons. If the spring has a stiffness constant of 71 N/m, what is the force required to hold the spring in a stretched position 0.075 m beyond its equilibrium position?

1-10: 5 SEE ANSWER

6. A sound wave in a medium (not air) has a wavelength of 50 m and a frequency of 220 Hz. What is the speed of sound in this medium?

1-10: 6 SEE ANSWER

7. A sound source far removed from reflecting surfaces has an intensity measured to be 0.5 W/m squared at a distance 20 m from the source. If you moved back to 40 m from the source what would happen to the intensity of the sound?

(a) increase

(b) decrease

(c) remain the same

1-10: 7 SEE ANSWER

8. Suppose the period of a vibrating piano string decreased as the amplitude decreased. What would be the musical consequences of such behavior?

1-10: 8 SEE ANSWER

Continue: #REDIRECT 2-1 Objective

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