(a) An experimenter wishes to generate in air a sound wave that has a displacement amplitude of 6.20   10-6 m. The pressure amplitude is to be limited to0.850 Pa. What is the minimum wavelength the sound wave can have? (Take the equilibrium density of air to be ρ = 1.20 kg/m3 and assume the speed of sound in air is v = 343 m/s.)   (b) Calculate the pressure amplitude of a 2.80 kHz sound wave in air, assuming that the displacement amplitude is equal to 2.00 ✕ 10-8 m.[Note: Use the following values, as needed. The equilibrium density of air is ρ = 1.20 kg/m3. The speed of sound in air is v = 343 m/s. Pressure variations ΔP are measured relative to atmospheric pressure, 1.013 ✕ 105 Pa.]   (c) Earthquakes at fault lines in Earth's crust create seismic waves, which are longitudinal (P-waves) or transverse (S-waves). The P-waves have a speed of about 9 km/s. Estimate the average bulk modulus of Earth's crust given that the density of rock is about 2500 kg/m3.

Estimate the speed of sound in air at standard temperature and pressure. The mass of 1 mole of air is given to be 29.0*1/1000 kg.

The speaker diaphragm with a diameter of 30 cm oscillates with an amplitude of shift 0.020 mm. Calculate the amplitude of pressure and the strength and total power of the sound, transmitted by the speaker. (The solutions are 55 Pa, 3.5 W / m², 0.25 W)

A periodic vibration at x = 0, t = 0 displaces air molecules along the x direction by smax = 3.2E-05 m. The motion produces a sound wave that travels at a velocity of v = 336 m/s with a frequency of f = 120 Hz. Take the density of air as ρa = 1.20 kg/m3. Calculate the displacement of the air molecules using an function for the traveling sound wave in terms of time and position at time t = 0.001 s and displacement x = 1.0 m.  Write an expression for the maximum pressure exerted by the sound wave ΔPmax in terms of the air density ρa, the sound velocity v, the angular frequency ω, and the maximum displacement smax. The sound wave is directly incident on a sheet of paper of surface area A = 0.013 m2. Calculate the maximum force Fmax, in newtons, exerted on this sheet.

(1) Consider a steel wire of length 55 m and mass 10 g and a copper wire of length 30 m and mass 3.5 g both with diameter of 0.5 mm are connected end to end and stretched to a uniform tension of 200 N. Calculate the impedance and velocity of wave in both steel and copper wire. The densities of steel and copper wire are 7750 kg/m and 8940 kg/m respectively.

A section of drainage culvert 1.23 m in length makes a howling noise when the wind blows across its open ends. (A) Determine the frequencies of the first three harmonics of the culvert if it is cylindrical in shape and open at both ends. Take v = 343 m/s as the speed of sound in air.

can you please ans (a), (b) & (c)?

At what temperature would the speed of sound in oxygen be same as that in hydrogen at 27 degree C . Given that at 0 degree C , their densities are in the ratio 8:1.

68 A single pulse, given by h(x - 5.01), is shown in Fig. 16-45 for t = 0. The scale of the vertical axis is set by h, = 2. Here x is in centimeters and t is in seconds. What are the (a) speed and (b) di- rection of travel of the pulse? (c) Plot h(x – 5t) as a function of x for 1 = 2 s. (d) Plot h(xr – 5t) as a func- tion of t for x = 10 cm. %3D %3! t= 0 Figure 16-45 Problem 68.