Answer:
a) frequency = 128.6Hz
b) Period = 0.0078second
Step-by-step explanation:
Frequency (f) is defined as the number of oscillation/vibration completed by a wave in one second. Mathematically, it is the ratio of the velocity of wave (v) to the wavelength (¶) of the wave.
f = v/¶.
Velocity (v) = 346m/s
Wavelength (¶) = 2.69m
f = 346/2.69
Frequency = 128.6Hertz
Period is the time taken for a wave to complete an oscillation/vibration. Period (T) is the reciprocal of the frequency (f) of vibration.
T = 1/f
Given f = 128.6Hz
T = 1/128.6
T = 0.0078second
The period of the wave is 0.0078second