In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. for example, the note at 110 hz has two strings at this frequency. if one string slips from its normal tension of 602 n to 564.00 n, what beat frequency is heard when the hammer strikes the two strings simultaneously? beats/s

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.