Answer
(a) The frequency of the sound wave is $340~Hz$
(b) The frequency of the radio wave is $3.0\times 10^8~Hz$
Work Step by Step
(a) We can find the frequency:
$\lambda~f = v$
$f = \frac{v}{\lambda}$
$f = \frac{340~m/s}{1.0~m}$
$f = 340~Hz$
The frequency of the sound wave is $340~Hz$
(b) We can find the frequency:
$\lambda~f = c$
$f = \frac{c}{\lambda}$
$f = \frac{3.0\times 10^8~m/s}{1.0~m}$
$f = 3.0\times 10^8~Hz$
The frequency of the radio wave is $3.0\times 10^8~Hz$
