An ambulance is traveling East at 20m/s. The siren emits a fixed frequency of 29

Question

An ambulance is traveling East at 20m/s. The siren emits a fixed frequency of 290Hz. Each of the following cars is traveling down the road as described. Determine if the driver of the car will hear a frequency the same as 290Hz, higher than 290Hz, or lower than 290Hz. I really suggest drawing a picture to help sort this out.
1. A car driving East at a speed of 20m/s. The car is in front of the ambulance.
2. A car driving East at a speed of 25m/s. The car is behind the ambulance.
3. A car driving West at a speed of 15m/s. The car is moving towards the ambulance.
4. A car sitting stationary at the side of the road watching the oncoming ambulance.

Higher, lower, or the same?

Explanation / Answer

A car driving East at a speed of 20m/s. The car is in front of the ambulance. =>Same frequency

A car driving East at a speed of 25m/s. The car is behind the ambulance. =>higher than 290Hz

A car driving West at a speed of 15m/s. The car is moving towards the ambulance. =>higher than 290Hz

A car sitting stationary at the side of the road watching the oncoming ambulance. =>higher than 290Hz

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.