Question

3 multiple choice 10 points which of the following is true for sound waves? they require a medium. they can travel in a vacuum. they cannot travel through liquids they are unrelated to vibrations.

Explanation:

• Sound waves are mechanical waves. Mechanical waves need a medium (like air, water, solids) to travel because they transfer energy through particle vibrations in the medium.
• A vacuum has no particles, so sound can't travel there (eliminating the "vacuum" option).
• Sound can travel through liquids (e.g., whales communicate underwater), so the "cannot travel through liquids" option is wrong.
• Sound is produced by vibrations (e.g., a tuning fork vibrates to make sound), so the "unrelated to vibrations" option is wrong.

Answer:

A. They require a medium.