Ignore my work. Equation at top left of paper. The ones with a an "X" are not needed to be done. Thanks!

wavelength (m) V 13.25 = f ( 4.S) frequency (Hz) 20. Ocean waves are observed traveling along the water surface during a developing storm. A Coast Guard weather station observes that there is a horizontal distance of 4.5 meters between each crest. The waves splash onto the station once every 3.25 seconds. Determine the speed of these waves. 23. Strong winds can apply a significant enough force to tall skyscrapers to set them into a back-and-forth motion. The amplitudes of these motions are greater at the higher floors but barely observable for the lowerfloors. It is said that one can even observe the vibrational motion of the Burj Khalifa ( the tallest building in the world, located in Dubai) on a windy day. As the Burj Khalifa vibrates back and forth, it makes about 8.6 vibrations in 60 seconds. What is frequency this vibration? 22. Beyonce the Bee flaps her wings back and forth 47 times each second. What is the period of her wing flapping? 23. A student is creating 10 waves every 5 seconds in a rope. The velocity of the waves produced is 3 m/s. a. What is the frequency of this wave? 2 Hz + = 10 / 5 = 2 b. What is the wavelength of this wave? 2 112 24. The entire set of waves shown was generated in 5.0 seconds. 1/2 a. Calculate the period of this wave. b . Calculate the frequency of this wave. . S C. Calculate the wavelength of this wave. 0.25 meters d. Calculate the velocity of this wave. . R S f = 2: 5/ 8 2. she C# D# F# G# A# Db Eb Gb Ab Bb C D E F G A B C' 261.6 Hz 293.6 Hz 329.6 Hz 349.2 Hz 392 Hz 440 Hz 493.2 Hz 523.2 Hz 25. A pianist plays a note that has an approximate wavelength of 0. 867 m. If the speed of sound in air at this location is 340 m/s, which piano key represents the approximate frequency of the sound wave produced