While watching ocean waves at the dock of the bay, Otis notices that 9 waves pass beneath him in 28 seconds. He also notices that the crests of successive waves exactly coincide with the posts that are 5 meters apart. What are the period, frequency, wavelength, and speed of the ocean wave?

Question

While watching ocean waves at the dock of the bay, Otis notices that 9 waves pass beneath him in 28 seconds. He also notices that the crests of successive waves exactly coincide with the posts that are 5 meters apart. What are the period, frequency, wavelength, and speed of the ocean wave?
   What is the period?
   Frequency?
   Wavelength?
 and speed?

Sivashen · Answer

FREQUENCY=...... 9WAVES:28SECONDS
X WAVES:1SECOND
28X=9
X=9/28
X=0.32HZ

PERIOD=1/F
=1/0.32
=3.13SECONDS

WAVELENGTH
=TOTAL DISTANCE/NUMBER OF WAVES
=9*5/9
=45/9
=5

SPEED
V=F*WAVELENGTH
V=0.32HZ*5
V=1.6 M.S