An observer sits in a boat watching wave fronts move past the boat. the distance between successive wave crests is 0.80 m, and they are moving at 2.2 m / s. what is the wavelength of these waves? 1.6 m 2.2 m 0.80 m what is the frequency of these waves? 0.36 hz 2.8 hz 0.80 hz what is the period of these waves? 0.80 s 0.36 s 2.8 s

Using the wavelength expressions, such as the distance between two peaks of a wave, that of the frequency as a function of the speed and the wavelength, such as the period inversely proportional to the frequency we have to for the first question

the wavelength is the distance between the two ridges that is

For the second question the frequency is determined as the rate of change of the velocity versus the wavelength, that is

For the third question the period is inversely proportional to the frequency, therefore

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

if they have a finite resultant