Question

1.A wave has a period of 20 seconds. What is the frequency?

2.In 4 seconds 3 waves pass a point. What is the frequency? What is the period?

3.What is the speed of a wave that has a frequency of 2Hz, an amplitude of 10m, and a wave length of 5m?

Answer 1

1). Frequency = (1/period) = 1/(20sec) = (1/20) per sec .

2). Frequency= (3 waves) / (4 sec) = (3/4) (per sec)
Period = (1/freq) = 1/(3/4 per sec) = (4/3) sec

3). Speed= (freq) x (wavelength) (2 per sec) x (5 m) = (2 x 5) ( m per sec)
Speed doesn't depend on amplitude.