As shown below, a garden room has three walls, a floor, and a ...

[misspop]

As shown below, a garden room has three walls, a floor, and a roof, but is open to the garden on one side. The wall widths are L and w. The roof height is h. When traveling sound waves enter the room, standing sound waves can be present in the room if the wavelength of the standing waves is
 
 
 
   
  a.
  , where n is a positive integer.
   
  b.
  , where n is an odd integer.
   
  c.
  , where n is an even integer.
   
  d.
  in all cases listed above.
   
  e.
  given by (a) or (b) above, but not by (c).

Question 2

An observer stands 3 m from speaker A and 4 m from speaker B. Both speakers, oscillating in phase, produce 170-Hz waves. The speed of sound in air is 340 m/s. What is the phase difference (in radians) between the waves from A and B at the observer's location, point P?
 
 
 
   
  a.
  0
   
  b.
  /2
   
  c.
 
   
  d.
  2
   
  e.
  4

[Zack0mack0101@yahoo.com]

Answer to Question 1

e

Answer to Question 2

c