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Unformatted text preview: Abd Elhai, Mohamed – Homework 13 – Due: May 13 2008, 9:00 pm – Inst: Dr Kevin Dean 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. This is ONLINE HOMEWORK No. 13 It is due by 06:00 AM Abu Dhabi Time on Wednesday 14 May (9:00 PM Tue. 13 May, Texas time). 001 (part 1 of 1) 10 points An experimenter wishes to generate in air a sound wave that has a displacement ampli- tude equal to 6 . 2 × 10- 6 m. The pressure amplitude is to be limited to 0 . 53 Pa. Use the equilibrium density of air to be 1 . 29 kg / m 3 and the speed of sound in air to be 343 m / s. What is the minimum wavelength the sound wave can have? Answer in units of m. 002 (part 1 of 1) 5 points A sound wave in air has a pressure amplitude equal to 0 . 0069 Pa. Calculate the displacement amplitude of the wave at a frequency of 5 kHz. The density of the air is 1 . 2 kg / m 3 and the speed of sound...
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