Problem 1.15
Use the rules for signifi cant fi gures to fi nd the answer to the addition problem 21.4 15 17.17 4.003. (a) 57.573 (b) 57.57 (c) 57.6 (d) 58 (e) 60
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Physics 2 for Engineering Week 12 Oscillation Power = Energy / time Power is proportional to amplitude 2 Intensity = Power / Area for sound waves Mechanical Waves Needs medium to propagate As opposed to electromagnetic waves propagate in free space (light waves) Transverse wave- string, water; oscillation in y direction, movement in x direction Longitudinal wave- sound; oscillation in same direction as movement Simple Harmonic Motion y = A cos (ω t + ϕ) ϕ is phase constant Wave Equation y= A cos (k x - ω t) Where k is the wave number = 2π/λ Where λ is the wavelength (separation of two crests
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Chapter 1, Problem 1.15 is Solved
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