ZuoTi.Pro
Question

A police car drives past you with its siren on. While the car is approaching, you...

A police car drives past you with its siren on. While the car is approaching, you hear a frequency of 550 Hz. A Recalling that the speed of sound is 767 mph, what is the speed of the police car if the siren has a frequency of 507 Hz when neither you nor the car are moving? B What would the apparent frequency of the siren be if you were driving toward the parked police car at this same speed.

A.60mph

b.547Hz

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

A)while source of sound is approaching observer

Apparent frequency=550 Hz

Speed of sound=767mph

Let speed of car be v

Actual frequency of sound=507 mph

550=507*(767/767-v)

v=60 mph

B)

Apparent frequency=(767+60)/767 * 507=547 Hz

0 0
Add a comment
Know the answer?
Add Answer to:
A police car drives past you with its siren on. While the car is approaching, you...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 1 Consider the case where you hear the police siren at a frequency of 800 Hz...

    1 Consider the case where you hear the police siren at a frequency of 800 Hz when approaching and 400 Hz after passing you. How fast is the police traveling? 2. approaching and 450 Hz after passing you, but because of changes in the atmosphere, the speed of sound is 300 m/s. How fast is the police traveling? Consider the case where you hear the police siren at a frequency of 800 Hz when 3. If the police car is...

  • 1 Consider the case where you hear the police siren at a frequency of 800 Hz...

    1 Consider the case where you hear the police siren at a frequency of 800 Hz when approaching and 400 Hz after passing you. How fast is the police traveling? 2. approaching and 450 Hz after passing you, but because of changes in the atmosphere, the speed of sound is 300 m/s. How fast is the police traveling? Consider the case where you hear the police siren at a frequency of 800 Hz when 3. If the police car is...

  • Please answer all four questions. 1 Consider the case where you hear the police siren at...

    Please answer all four questions. 1 Consider the case where you hear the police siren at a frequency of 800 Hz when approaching and 400 Hz after passing you. How fast is the police traveling? 2. approaching and 450 Hz after passing you, but because of changes in the atmosphere, the speed of sound is 300 m/s. How fast is the police traveling? Consider the case where you hear the police siren at a frequency of 800 Hz when 3....

  • A police car is traveling at 144 km/h toward you. The police car's siren is sounding...

    A police car is traveling at 144 km/h toward you. The police car's siren is sounding at a frequency of 550 Hz. What frequency of sound, in Hz, would you hear as you approach the police car at speed of 99 km/h?

  • 2. (19 points) You are driving along a highway when you hear the siren of a...

    2. (19 points) You are driving along a highway when you hear the siren of a police car driving at approaching you from behind, and you perceive the frequency as 1320 Hz. You are relieved that he is in pursuit of a speeding Porsche 911car when he continues past you, but now you perceive the frequency as 1265 Hz. (The speed of sound in the air is 344 m/s.) m/ a) What is the frequency of the siren in the...

  • you are driving along a highway at 35.0 m/s when you hear the siren of a...

    you are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind at constant speed and you perceive the frequency as 1310 Hz. you are relieved that he is in pursuit of a different driver when he continues past you, but now you perceive the frequency as 1240 hz. what is the frequency of the siren in the police car? the speed of sound in air is 343 m/s

  • A police car is travelling at a speed of 144km/h. It has a siren with a...

    A police car is travelling at a speed of 144km/h. It has a siren with a frequency of 1120Hz. Assume that the speed of sound in air is 320m/s. a) If the car is moving toward you, what frequency will you hear for the siren? b) If the car had been moving away from you at the same speed, what frequency would you have heard?

  • 2)While standing at a point on the roadside shoulder, a police car chasing a speeder was...

    2)While standing at a point on the roadside shoulder, a police car chasing a speeder was approaching you at speed V. At that moment you hear the siren of the police car at a frequency of f’=560 Hz. When the police car passes, the frequency of the siren changes to f”=480 Hz. The speed of sound is vs=360 m/s. Express f” in terms of vs, f, and V where f is the frequency of siren produced (symbols only).

  • 2. Consider the case where you hear the police siren at a frequency of 800 approaching...

    2. Consider the case where you hear the police siren at a frequency of 800 approaching and 450 Hz after passing you, but because of changes in the atmosphere, the speed of sound is 300 m/s. How fast is the police traveling?

  • 3. If the police car is moving at 34 m/s and you hear a frequency of...

    3. If the police car is moving at 34 m/s and you hear a frequency of 550 Hz. when the car is approaching, what is the original frequency of the police car? (use the speed of sound as 343 m/s)

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT