Question

You are on a county road driving at a speed of 28 m/s when you hear...

You are on a county road driving at a speed of 28 m/s when you hear the siren of an oncoming fire engine. As the fire engine approaches you, you hear the frequency of its siren as 2830 Hz, but once it has passed you the frequency becomes 1860 Hz. What is the speed of the fire engine? The speed of sound in air is 343 m/s.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A motorcyclist is traveling north on a road at a speed of 29.0 m/s. A fire...
A motorcyclist is traveling north on a road at a speed of 29.0 m/s. A fire truck, traveling south at a speed of 49.0 m/s, approaches with its siren producing sound at a frequency of 2550 Hz. (Enter your answers in Hz. Assume that the speed of sound in air is 343 m/s.) (a) What frequency does the motorcyclist observe as the fire truck approaches? (Enter your answer to the nearest integer.) (b) What frequency does the motorcyclist detect after...
The frequency will sound different if we hear a sound source moving relative to us. This...
The frequency will sound different if we hear a sound source moving relative to us. This phenomenon is called the Doppler Effect in Physics. An ambulance sounds a siren at 1515 Hz and passes a cyclist moving at 2.12 m / s. After the ambulance passed, the cyclist heard a siren sound at a frequency of 1501 Hz. The speed of sound in the air is about 343 m / s. What is the speed (speed) of the ambulance in...
A fire engine's siren is 1400 Hz when at rest. Assume that the speed of sound...
A fire engine's siren is 1400 Hz when at rest. Assume that the speed of sound is 343 m/s in air. What frequency do you detect if you move with a speed of 21 m/s toward the fire engine? (Express your answer to two significant figures.) What frequency do you detect if you move with a speed of 21 m/s away from the fire engine? (Express your answer to two significant figures.)
(a) A fire truck with the 500 Hz siren on approaches an observer at 50 m/s,...
(a) A fire truck with the 500 Hz siren on approaches an observer at 50 m/s, who is at rest. What frequency would observer detect? (b) A fire truck with the 500 Hz siren on is at rest. An observer approaches the fire truck with the speed of 50 m/s. What frequency would the observer detect? (The speed of sound is 343 m/s.)
A convertible with the top down is traveling north on a road at a speed of...
A convertible with the top down is traveling north on a road at a speed of 27.0 m/s. An ambulance, traveling south at a speed of 47.0 m/s, approaches with its siren producing sound at a frequency of 2450 Hz. (Enter your answers in Hz. Assume that the speed of sound in air is 343 m/s.) (a) What frequency does the driver of the convertible observe as the ambulance approaches? (Enter your answer to the nearest integer.) Hz (b) What...
A car approaches you at a constant speed, sounding its horn, and you hear a frequency...
A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 40 Hz. After the car goes by, you hear a frequency of 60 Hz. What is the frequency of the sound emitted by the horn? The speed of sound in the air is 343 ms-1.
In a high-speed car chase, a bank robber is driving at 50 m/s, being chased by...
In a high-speed car chase, a bank robber is driving at 50 m/s, being chased by a police car travelling at 40 m/s. The police siren has a frequency of 1000 Hz and the speed of sound at this location is 340 m/s. What frequency does the robber hear as the cop car gives chase? Another officer, standing on the road, is placing spike strips ahead of the chase. What frequency will the officer hear as the cars are approaching?
Standing at a crosswalk, you hear a frequency of 590 Hz from the siren of an...
Standing at a crosswalk, you hear a frequency of 590 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 497 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)
The siren of a fire engine that is driving northward at 32.0 m/s emits a sound...
The siren of a fire engine that is driving northward at 32.0 m/s emits a sound of frequency 2200 Hz . A truck in front of this fire engine is moving northward at 17.0 m/s . Part A What is the frequency of the siren's sound that the fire engine's driver hears reflected from the back of the truck? Part B What wavelength would this driver measure for these reflected sound waves?
You are standing on the sidewalk and hear an ambulance siren at 500 Hz when the...
You are standing on the sidewalk and hear an ambulance siren at 500 Hz when the ambulance is approaching and at 400 Hz when the ambulance is going away from you. How fast is the ambulance moving? (Note: the speed of sound is 343 m/s). a.) 38.1 m/s b.)343 m/s     c.)58.6 m/s d.)49.3 m/s e.)12.2 m/s
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT