Draw Q | |A at Ask Copilot 1 of 1 | 2 | ED RE 1311 Assignment # 2 Spring (Please, show formulas and your work) 1) A pressure wave (moving on the x-direction) has the following mathematical expression: p = Po cos(300t - 2x) , t is time in second, x is position in meters a) Identify its wave number and its angular frequency. b) Calculate its wavelength, its linear frequency, its period, and its speed 2) Calculate the speed of sound on an event when a 1500 Hz frequency has a wavelength of 0.21 m. 3) On the following diagram, if the power of sound at the source outlet is 100 W a) What is its intensity at 4 m away from the source? b) What is the corresponding loudness? 4) Water flows in a fire hose with a speed of 1 m/s and a pressure of 200 000 Pa. At the nozzle, the pressure decreases to its atmospheric value (101 300 Pa). Assume there is no change in height and use the Bernoulli's Principle to calculate the speed of the water leaving the hose. 5) Explain the causes of Lift and Drag on the illustration below: Airfoil Lif motion _Drag