Question

procedure:

1. with one hand, hold a ruler on your desk so that one end of it hangs over the edge.
2. with your other hand, pull the hanging end of the ruler up a few centimeters, and let go.
3. try pulling the ruler up different distances. (not too much or it’ll break.) how does the distance affect the sounds you hear?

quite and loud

1. what property of the sound wave are you changing?

wavelength

1. continuously change the length of the part that hangs over the edge and pull the hanging end of the ruler up. how does changing the length affect the sound you hear?

the more room you give it the more deeper it sounds.

1. what property of the sound wave is affected?

pitch

Explanation:

For Question 3:

When pulling the ruler up different distances, the amplitude of the ruler's vibration changes. A larger pull distance (amplitude) leads to more energy, making the sound louder (greater intensity), and a smaller distance makes it quieter. The original answer has a spelling error ("quite" should be "quiet"), but the concept about loudness variation is on track.

For Question 4:

Pulling the ruler up different distances changes the amplitude of the vibration (which produces the sound wave). Amplitude relates to the loudness (intensity) of the sound. The original answer said "wavelength", which is incorrect. Wavelength is related to frequency/pitch, while amplitude relates to loudness. The correct property is amplitude (or intensity/loudness, as amplitude of the sound wave corresponds to loudness).

For Question 5:

Changing the length of the hanging ruler changes its natural frequency of vibration. A longer hanging length makes the ruler vibrate slower (lower frequency), resulting in a lower - pitched (deeper) sound. A shorter hanging length makes it vibrate faster (higher frequency), resulting in a higher - pitched sound. The original answer's description about "more room" leading to a "deeper" sound is a rough but understandable way to describe the change in pitch with length, though the wording could be more precise (e.g., "the longer the hanging part, the lower the pitch (deeper the sound); the shorter the hanging part, the higher the pitch").

For Question 6:

Changing the length of the hanging ruler affects the frequency of the ruler's vibration, which in turn affects the pitch of the sound wave. A higher frequency gives a higher pitch, and a lower frequency gives a lower pitch. The original answer "Pitch" is correct because the length change modifies the vibration frequency, and pitch is the perceptual quality related to frequency.

Answer:

Question 3:

The distance you pull the ruler up affects the loudness of the sound. Pulling it up a larger distance makes the sound louder, and a smaller distance makes it quieter (note: correct the spelling error from "quite" to "quiet" in the original answer).

Question 4:

The correct property is amplitude (not wavelength). Pulling the ruler up different distances changes the amplitude of the vibration (and thus the amplitude of the sound wave), which affects the loudness of the sound.

Question 5:

Changing the length of the hanging part of the ruler affects the pitch of the sound. A longer hanging length makes the sound deeper (lower - pitched), and a shorter hanging length makes the sound higher - pitched.

Question 6:

The property affected is pitch. Changing the length of the hanging ruler changes its vibration frequency, and pitch is the property of the sound wave related to frequency.