With the upcoming presidential election, ira decided to create a survey to find out who might win. he carefully created a valid
survey and gave it to five of his closest friends. he then tallied the results from the surveys and published his data in the school
newspaper. which of these would be a reason why ira's results are not valid?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?