A wave of amplitude 0.40 m interferes with a second wave of amplitude 0.26 m traveling in the same direction. (a) What is the largest resultant amplitude that can arise, and under what conditions will this maximum occur? m (b) What is the smallest resultant amplitude that can arise, and under what conditions will this minimum occur?

The equation for the displacement of a stationary wave on a string is given by y = 2 (sin 5πt)(cos 6πx), where x and y are in meters, and t is in seconds.  Determine:  b.  the amplitude of the point P which lies at a distance of 75 cm from the end of the reflection!

3: Which of the following describes a standing wave of amplitude 0.5 m, wavelength 2 m and period 32 of amplitude s? (in each, z is in m and t is in s) a: 0.5 sin(x-t/16) b: 0.5 sin(x/16-nt) c: 0.5 sin(x) cos(nt/16) d: 0.5 sin(x/16) cos(nt) e: sin(x) cos(16mt)

A model aircraft with an engine producing vibrations of constant frequency of ?0 =500 ?? flies at a constant speed in horizontal circle of radius ? = 15 ? and completes one revolution in 5.0 ?. An observer situated in the plane of the circle and 50 ? from its centre monitors the frequency of sound from the engine. Using the speed of sound in air as 340 m/s, calculate the maximum and minimum observed frequencies.