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A string of mass per unit length μ 1 g/nn is stretched to a tension of T = 20 N. A wave is induced on the string of wavelength λ 0.5 m. Find the frequency of the wave (f =?) Problem 3: n air column closed at one end and open at another end vibrates at a fundamental frequency of f = 261.6 Hz. What is the length of the air column (L) Problem 4 A child cries with an intensity of 1 5 × 10-6 W/m2. What is the intensity level in decibels (β)? Now suppose that three children are crying, each with the same intensity as the original child, what is the new intensity level in decibels? Problem 5: A car moves towards you at a speed of 30 m/s. You notice that the car is rumbling at a frequency off, 100 Hz. what is the frequency of the rumble from the point of view of the car driver (f)? Problem,b汤: 100 Ht(i-u/50 mls ) ! 6 What is the pressure at the bottom of a water tank whose height is h = 10 m? (The density of water is 1000 kg/m3)
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