This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Two police cars have identical sirens that produce sound of frequency of 570 Hz. A stationary ... (Read 147 times)

Ebrown

  • Hero Member
  • *****
  • Posts: 567
on: Jul 29, 2018
Two police cars have identical sirens that produce sound of frequency of 570 Hz. A stationary listener is standing between two cars.
 
  One car is parked and the other is approaching the listener and both have their sirens on. The listener measures 9.0 beats per second. Find the speed of the approaching police car. The speed of sound is 340 m/s.

Question 2

A violin with string length 32 cm and string density resonates in its fundamental with the first overtone of a 2.0-m organ pipe with one end closed and one end open. What is the tension in the string if the speed of sound in air is 344 m/s?
 
  A) 110 N B) 4100 N C) 56 N D) 1000 N E) 450 N


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kilada

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Jul 29, 2018
Answer to Question 1

5.3 m/s

Answer to Question 2

D


Ebrown

  • Hero Member
  • *****
  • Posts: 567
Reply #2 on: Jul 29, 2018
Thank you!


kilada

  • Sr. Member
  • ****
  • Posts: 311
Reply #3 on: Jul 29, 2018
Always glad to help...


« previous next »
 

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Plant apical meristems and the primary tissues they produce. Plant apical meristems and the primary tissues they produce.
Radio Frequency Lesion Radio Frequency Lesion
Examples of the most common X-ray positions and the images they produce. Examples of the most common X-ray positions and the images they produce.
Loudness and Frequency Loudness and Frequency
identical (left) and fraternal (right) twins identical (left) and fraternal (right) twins
The consequences of the intensity of natural selection on allele frequency. The consequences of the intensity of natural selection on allele frequency.
Video: Types of antimicrobial substances (interferons & complement protein)

For a complete list of videos, visit our video library