Q: Two travelling waves meet: y1 = (5 cm) * cos ( 3 rad/m * x - 0.1 rad/s * t ) y2 = (5 cm) * cos ( 3 rad/m * x - 0.1 rad/s * t + 1 rad ) Is the amplitude of the combined wave a) bigger than either original wave b) smaller than either original wave c) the same as either original wave What is the SPEED of this combined wave?
Joe goes to the concert hall and hears two pianos played at once. Each piano strikes an identical 250 Hz note.
Q: Does Joe hear constructive interference, destructive interference, or something in between? Q: If Joe wants to hear a louder sound, what should he do? Be specific.