Question

what distinguishes sound waves as mechanical waves? choose 1 answer: a they travel at the speed of light b they are produced by electromagnetic sources c they require a medium for propagation d they can pass through a vacuum

Explanation:

Mechanical waves require a medium (such as air, water, or solids) to travel through. Sound waves cannot travel in a vacuum and rely on particle - to - particle interaction in a medium for propagation. Light waves travel at the speed of light and are electromagnetic, not mechanical. Sound waves are not produced by electromagnetic sources and cannot pass through a vacuum.

Answer:

C. They require a medium for propagation