Ardent Franz is playing his alpenhorn at a distance some kilometers from the vertical rock face in front of which his beloved Grizelda is tending her flock of goats. He is playing Grizeldan's favorite note, 24.0Hz. The speed of sound is 340m/s.
i) Determine the wavelength of the sound.
ii) Draw the standing wave for the air displacement in front of rock face and find where Grizelda should sit in order to be at node.