141 Hertz

Use the formula

V = f(λ)

where V is velocity = 423 meters/sec, f is the frequency in Hertz, and λ is the wavelength in meters = 3 meters

Rearrange the formula

f= V/λ = (423 m/s)/3m = 141 cycles per second = 141 Hertz

Hi Angela,

I found that understanding some concepts is easier with certain "phrases"

for example, Frequency is "waves per second"

so if your frequency was 100Hz (hz = hertz = wave/second) then that would mean if you set a fixed point along the wave, then 100 full waves pass that point every second.

In the picture you posted, the speed of the wave is 423 m/s and each wave is 3m long (wavelength). Therefore we can find how many waves pass in each second. 423 meters/second ÷ 3 meters/wave = 141 waves/second. So that means 141 waves pass a fixed point every second and the Frequency is 141 Hz

The frequency of a wave, represented by the letter f, is the number of occurrences of a repeating event per unit time. How many times does the wave repeat on 1 second?

The length of 1 cycle = 3m

The frequency c/s, will be, 423m/s./ 3m = 141 c/s, or Hz.

First, find the period, T, which is 3m/423(m/s) ---> T = 0.007092....

Then the frequency can be found through f = 1/T ---->1/0.007092 = f = 141 rad/s

what is the frequency?