Receding moving-source Doppler frequency
A sound source in a ambulance siren recording moves away from a stationary observer at \(10\,\text{m s}^{-1}\). The emitted frequency is \(560\,\text{Hz}\) and sound speed is \(340\,\text{m s}^{-1}\). Calculate the observed frequency. Use the diagram labels before calculating the requested value. Enter the numerical result and choose the interpretation that matches the wave physics.
Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.