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

Author Question: An enclosed chamber with sound absorbing walls has a 2.0 m 1.0 m opening for an outside window. A ... (Read 36 times)

CQXA

  • Hero Member
  • *****
  • Posts: 546
on: Jul 29, 2018
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
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B


CQXA

  • Member
  • Posts: 546
Reply 2 on: Jul 29, 2018
Excellent

ultraflyy23

  • Member
  • Posts: 312
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Lithotripsy. The direction of a sound pulse crushes the stones into smaller fragments that can be pa Lithotripsy. The direction of a sound pulse crushes the stones into smaller fragments that can be pa
Opening sterile kit 3 Opening sterile kit 3
The physician uses percussion—tapping—to detect sound or vibration. The physician uses percussion—tapping—to detect sound or vibration.
A direct injection diesel engine injects the fuel directly into the combustion chamber. Many ... A direct injection diesel engine injects the fuel directly into the combustion chamber. Many ...
Flowering plants such as papayas hold on to their spores and disperse by releasing seeds enclosed in Flowering plants such as papayas hold on to their spores and disperse by releasing seeds enclosed in
Video: Methods that regulate pH

For a complete list of videos, visit our video library