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Grade: 10
        
The diagram shows the variation of air pressure from an alarm Siren at particular instant. The speed of sound in the air is 340m/s. What is the period of alarm Siren ?
one year ago

Answers : (1)

Vikas TU
9499 Points
							
Dear  Student, 
As we know that,
the distance between the two consecutive crests or troughs is lamda.
Hence it is given that,
lamda + lamda/4 = 1
Therfore,
5lamda/4 = 1
lamda = 4/5 = 0.8 m 
T = 0.8/340 = 2.235 ms.
 
one year ago
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