Question

which object is an example of a mechanical wave?

○ police siren

○ sunlight

○ light from a flashlight

○ microwaves used to heat food

Explanation:

Mechanical waves require a medium (like air, water, solids) to travel. A police siren produces sound waves, which are mechanical waves (needing air as a medium). Sunlight, flashlight light, and microwaves for heating are electromagnetic waves, which don’t need a medium and can travel through a vacuum.

Answer:

A. police siren