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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
10044 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 = 1Therfore,5lamda/4 = 1lamda = 4/5 = 0.8 m T = 0.8/340 = 2.235 ms.
```
one year ago
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