Question 111: Waves

Question

The velocity of sound in a gas, in which two wavelengths 4.08 m and 4.16 m produce 40 beats in 12s, will be :

Accepted Answer

$${v \over {4.08}} - {v \over {4.16}} = {{40} \over {12}}$$
$$v = {{40} \over {12}} 	imes {{4.08 	imes 4.16} \over {0.08}}$$
$$ = 707.2$$ m/s

Answer

282.8 ms
$$-$$1

Answer

175.5 ms
$$-$$1

Answer

353.6 ms
$$-$$1

Answer

707.2 ms
$$-$$1

Waves