True or False: Musical instruments produce certain frequencies that correspond to wavelengths of standing waves. O True O False
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- A sinusoidal wave of frequency 500 Hz has a speed of 370 m/s. (a) How far apart are two points that differ in phase by n/3 rad? (b) What is the phase difference between two displacements at a certain point at times 4.1 ms apart? (a) NumberTo.123 |Units m (b) Number Units radQ3: A 1.0 W point source emits sound waves isotopically. Assuming that the energy of the waves is conserved, find the intensity (a) 1.0 m from the source and (b) 2.5 m from the source. (Hint: the area of the sphere is 4ar')If the sound waves produced by a speaker change to a much higher frequency, what would it sound like? O quieter O louder O lower in pitch O higher in pitch
- A string 3.00 m long and fixed at both ends is vibrating in its third harmonic. The maximumdisplacement of any point on the string is 4.00 mm. The speed of transverse waves on this string is 50.0 m/s. (a)What is the wavelength of this wave? (b) What is the frequency of this wave?A progressive wave travelling in the x-direction is represented by the following equation: у %3D A sin(Bt — Сх). Given that parameters A, B and C are given in SI units calculate the velocity of the wave for A = 50, B = 2835 and C = 25.An organ pipe (closed at one end) produces a mixture of 1100 Hz and 1833 Hz. These frequencies correspond to the first and second overtones respectively. What is the frequency of the first harmonic?