This topic contains a solution. Click here to go to the answer

Author Question: An enclosed chamber with sound absorbing walls has a 2.0 m 1.0 m opening for an outside window. A ... (Read 49 times)

CQXA

  • Hero Member
  • *****
  • Posts: 546
An enclosed chamber with sound absorbing walls has a 2.0 m  1.0 m opening for an outside window. A loudspeaker is located outdoors, 78 m away and facing the window.
 
  The intensity level of the sound entering the window space from the loudspeaker is 79 dB. Assume the acoustic output of the loudspeaker is uniform in all directions and that the acoustic energy incident upon the ground is completely absorbed and therefore is not reflected into the window. The threshold of hearing is 1.0  10-12 W/m2. The acoustic power entering through the window space is closest to A) 160 W.
  B) 79 W.
  C) 320 W.
  D) 790 W.
  E) 1600 W.

Question 2

If the velocity of an object is zero at some point, then its acceleration must also be zero at that point.
 
  A) True
  B) False



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cam1229

  • Sr. Member
  • ****
  • Posts: 329
Answer to Question 1

A

Answer to Question 2

B




CQXA

  • Member
  • Posts: 546
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it


tranoy

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

For a complete list of videos, visit our video library