What frequency is received by a person watching an on coming ambulance moving at 10 Km/h and emitting a steady 800 Hz sound from its siren? The speed of sound on hat day is 345 m/s. Assume the ambulance moves towards the person.
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- A bat traveling at a speed of 18.1 m/s sends out sound at a frequency of 48.2 kHz, can 'see' objects due to echolocation. What frequency would the bat hear returning from a stationary wall in front of it? (assume the speed of sound in air is 343 m/s)Please explain how you got the answer for this, thank you so much!While sitting next to a road on a calm, warm 27.9ºC evening, you see an ambulance's lights flashing in the distance coming towards you. You hear a frequency of 140 Hz. However, you know that ambulances have sirens that emit sound at 130 Hz. How fast is the ambulance approaching you, in m/s?
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