Question

part b: mechanical waves
media solid liquid gas
electromagnetic wave speed 255 m/s 890 m/s 8754 m/s
mechanical wave speed 765 m/s 342 m/s 89 m/s

1. based on the above chart, in which medium do sound waves travel the fastest?
2. based on the above chart, in which medium do sound waves travel the slowest?
3. how does density impact the speed of sound waves?

Explanation:

Step1: Identify sound waves as mechanical waves

Sound is a mechanical wave.

Step2: Compare mechanical - wave speeds in different media

We have speeds of mechanical waves in solid (765 m/s), liquid (342 m/s), and gas (89 m/s) from the table.

Step3: Determine the fastest - medium for question 5

Since 765 m/s (solid) > 342 m/s (liquid) > 89 m/s (gas), sound waves travel fastest in solids.

Step4: Determine the slowest - medium for question 6

Since 89 m/s (gas) < 342 m/s (liquid) < 765 m/s (solid), sound waves travel slowest in gases.

Step5: Analyze density - speed relationship for question 7

Generally, the denser the medium, the faster sound travels. In solids, particles are closely packed (high density), allowing sound to propagate quickly. In gases, particles are far apart (low density), resulting in slower sound - wave speeds.

Answer:

1. Solids
2. Gases
3. Generally, the denser the medium, the faster sound waves travel.