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Multiple choice. Indicate the best answer. A duck floating on a pond bobs up and down four times every 3.0 seconds as water waves pass. What is the frequency of the water waves? a. 4.0 Hz b. 3.0 sec c. 12 Hz d.1.33 Hz e.0.75 sec In a transverse wave, the medium vibrates the direction of energy transmission. a. opposite to b.parallel to c.perpendicular to d.above e.below Which type of wave results in circular motion of the medium? a.circular wave b. transverse wave c.surface wave d.longitudinal wave e. wave pulse Long Answer. Answer the following questions, showing all work. Identify the parts of the following wave: A submarine emits a sound pulse at 750.0 Hz that bounces off an enemy sub and returns 2.5 seconds after it is emitted. (Consider the speed of sound in water to be 1490.0 m/s) What is the wavelength (2) of the sound waves? . What is the period (T) of the sound waves? The speed of light in air is 2.998 x 108 m/s. A red laser emits light with a wavelength of 635 nm. What is its frequency? (Report your answer in s" and remember to convert nanometers to meters.) A blue laser emits light with a frequency of 6.74 x 1014 s-1. What is its wavelength? (Report your answer in nanometers, converting your answer from meters.)