Sound travels at a speed of `334"m s"^(-1)` in air. This means that

Options

A. the source of sound moves 334 m in one second
B. the listener moves 334 m in one second
C. air moves 334 m in one second
D. the disturbance in. air moves 334 m in one second

Answer

To solve the question regarding the speed of sound in air, we need to understand the implications of the statement that sound travels at a speed of 334 m/s in air. Let's break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Speed of Sound**:
- The speed of sound is given as 334 m/s. This means that sound waves can travel a distance of 334 meters in one second in the medium of air.

2. **Reference Frame**:
- The speed of sound is measured with respect to the medium it travels through, which in this case is air. This means that the speed of sound is constant in still air.

3. **Source of Sound**:
- The speed of sound does not depend on the speed of the source of sound or the listener. Once the sound is produced, it travels through the air at its own speed (334 m/s).

4. **Disturbance in Air**:
- The sound wave creates a disturbance in the air, which propagates through the air at the speed of 334 m/s. This is the key point: it is the disturbance (or sound wave) that moves at this speed.

5. **Evaluating Options**:
- We need to evaluate the given options based on our understanding:
- Option 1: "The source of sound moves 334 meters in one second." - This is incorrect because the speed of the source does not affect the speed of sound.
- Option 2: "The listener moves 334 meters in one second." - This is also incorrect for the same reason as above.
- Option 3: "The air moves 334 meters in one second." - This is incorrect because the speed refers to sound, not the movement of air.
- Option 4: "The disturbance in air moves 334 meters in one second." - This is correct as it accurately describes the propagation of sound waves.

6. **Conclusion**:
- Therefore, the correct interpretation of the statement is that the disturbance in air (the sound wave) moves 334 meters in one second.

### Final Answer:
The correct option is: **The disturbance in air moves 334 meters in 1 second.**

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