# Sound Final Assessment

16 Questions | Total Attempts: 81

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Final Assessment for Chapter 5, sections 1 - 4.

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• 1.
If you want to tune a guitar string to a higher frequency, you should
• A.

Increase the tension in the string

• B.

Decrease the tension in the string

• C.

Replace the string with a longer string

• D.

Replace the string with one that has more mass

• 2.
Explain your answer in question #1 in terms of wave speed, wavelength, and frequency.
• 3.
A student measures the pitch of several different strings of different lengths that are under the same tension. If she needs to record her data, what two headings would be in her data table?
• 4.
A student measures the pitch of several different strings of different lengths that are under the same tension. What is his independent variable?
• 5.
A student measures the pitch of several different strings of different lengths that are under the same tension and records the data. The student wants to produce a specific sound that falls somewhere in between the pitch of sounds already produced. If she wants to test only one more string, her best decision for a strategy to select the string would be:
• A.

Choose a length of string she has not yet measured

• B.

Graph the data from the measurements she has made and use the graph to predict the length of string she needs

• C.

Choose a length of string that is closest to the string that produced the frequency she wants

• 6.
Explain why the strategy you chose in question #5 is the best strategy
• 7.
Two waves with different shapes as shown below are moving toward each other on a coiled spring. Which of the following diagrams best shows the shape of the spring when the two waves meet?
• 8.
A wave is traveling along a spring as shown in the diagram below. If the wave frequency is 8.0 Hz, what is the wave speed?
• A.

0.75 m/s

• B.

6.0 m/s

• C.

12 m/s

• D.

4.0 m/s

• 9.
If you have a meter stick, what else would you need to measure the velocity of a wave on a spring?
• A.

The wave frequency

• B.

The wavelength of the wave

• C.

The wave amplitude

• D.

A stopwatch

• 10.
On question #9, explain your choice.
• 11.
Use the diagram below to answer which answer choice woul have no effect on pitch.
• A.

The size of the mass hanging from the string

• B.

The length of the string

• C.

The thickness of the string

• D.

How hard the string is plucked

• 12.
• 13.
If you slit one end of the straw and blow through it, the reed will vibrate and create a sound. If you want the sound to be louder, you should
• A.

Use a longer straw

• B.

Add a megaphone to the end of the straw

• C.

Reverse the straw and blow through the opposite end

• D.

Not blow as hard through the straw

• 14.
A guitar has six strings the same length but with different mass and thickness. If all of the strings are under the same tension, explain how the mass of the string affects the frequency of vibration.
• 15.
A guitar has six strings the same length but with different mass and thickness. When the tension on one of the strings is increased, what characteristic of the sound produced is affected? Explain why.
• 16.
A guitar has six strings the same length but with different mass and thickness. Use an equation and create a mathematical example to describe what happens to the speed of the wave on the guitar string when tension is increased.