Final answer:
Your vehicle's horn must be heard at 200 feet for safety and alerting others on the road.
Explanation:
200 feet is the distance at which your vehicle's horn must be heard. This is crucial for alerting other drivers or pedestrians to your presence, ensuring safety on the road.
Sound waves emitted by the horn can travel varying distances, as evidenced by Carrington 1949b: 25, where drum messages were heard between three to seven miles away.
Understanding the physics of sound propagation is key in situations like a car spotting a hazard 85 meters ahead, requiring quick braking reactions to prevent accidents.
Learn more about Sound Propagation and Safety on the Road here:
https://brainly.com/question/33515929
