An a-major chord consists of the notes called a, c#, and e. it can be played on a piano by simultaneously striking strings with fundamental frequencies of 440 hz, 554.37 hz, and 659.26 hz. the rich consonance of the chord is associated with near equality of the frequencies of some of the higher harmonics of the three tones. consider the first 5 harmonics of each string and determine which harmonics show near equality. (select all that apply.)

Aboat that travels with constant speed of 6.10 m/s in still water is to go directly across a river. the current in the river flows at 1.95 m/s. (a) at what angle must the boat be steered?

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When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)