Question

You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.15 m. Determine the frequency, period, and speed of these water waves.

Answer 1

frequency= 2waves/sec

wavelength= .15m

speed= 2hz*.15m= .30m/sec

Answer 2

Twice a second is frequency = 2 Hz
The period is therefore 1/2 = 0.5 seconds
In .5 seconds the wave goes .15 meters so its speed is
.15/.5 = .30 m/s