Unit: waves
Year: 1994 Question#: 40
Question: Base your answers to questions 39 through 41 on the diagram below which shows a parked police car with a siren on top. The siren is producing a sound with a frequency of 680 Hz, which travels first through point A and then through point B, as shown. The speed of the sound is 340 meters per second.
40. What is the wavelength of the sound produced by the car's siren?
(1 ) 0.50 m
(2 ) 2.0 m
(3 ) 2.3 x 105 m
(4 ) 2.3 x 10-6 m
What is this question really asking?
Explanation by: Derek N
[ Return to question menu ]
Answer 1
0.50 m
CORRECT
Using the formula
v=f
340m/s= 680 Hz x
. 
= 0.50 m.
return to top
Answer 2
2.0 m
INCORRECT
Try using the formula v = f
return to top Answer 3
2.3 x 105 m
INCORRECT
This is not a possible solution. Try using the formula v = f
return to top Answer 4
2.3 x 10-6 m
INCORRECT
Thsi is not a possible solution. Try using the formula v = f
return to top What's this question really asking?
What is the wavelength? return to top
