Chapter 11 Waves

# Chapter 11 Waves - rad/sec = 1.05 10^-2s What is the velocity V= wavelength/t = 1.05/1.05*10^2 = 100m/s What is the direction of the wave Negative

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Chapter 11 Waves 1. What is the intensity of the sun’s light at the orbit of the planet mercury? I earth = Power of the sun / I mercury = Power of the sun/ ms^2 I m / I e = res^2/ rm^2 = 1.5 *10^11/ 5.85* 10^10 = im/1400 = 1400 (1.5*10^11/ 5.85*10^10) =9200 2. What is the linear mass density of the cord? F= 75.0 N Speed = 140 m/s V= srF/u gives u=f/v^2 V^2 = f/u 75.0N/140m/s^2 = 0.0038Kg/m 3. Question 1 What is the direction of the velocity of a particle at the point labeled A? D) down 4. What is the direction of the velocity of a particle at the point labeled B? D) does not move 5. What is the wavelength of a wave whose speed and period are 75 m/s and 5.00 ms respectively? F=1/T v=wavelength *f = wavelength /T V= 75m/s and T= 5.00 ms Wavelength = 75.0 x 5.00*10^-3 = 3.75m

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6. A wave on a string has an equation (problem 11.22) What is the amplitude of the wave? 4.00 mm What is the wavelength? 2pi/K = 2 x 3.14/6.00 = 1.05 m What is the period? 2pi/ r = 2 x 3.14/ 6.
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Unformatted text preview: . rad/sec = 1.05 * 10^-2s What is the velocity? V= wavelength/t = 1.05/1.05 *10^2 = 100m/s What is the direction of the wave? Negative so it si in the X direction 7. What is the equation of a wave traveling to the left with amplitude 5.0 mm, angular frequency 65 rad/s, and wave number 4 rad/m? A) y (x,t)= (5.0mm)sin[(65rad/s)+(4 rad/m)x] 8. Question 3 What will be the amplitude of the resultant wave 1 second from now? D)1.3 9. Question 4 What will be the amplitude fo the wave crest when the right traveling wave reaches x=4m? D)-2.5 10. Light of wavelength 0.500 um in air enters the water in a swimming pool. The speed of light in water is 0.750 times the speed in air. What is the wavelength of the light in water? Vwater / wavelength water V water / v air = 0.750 = wavelength water/ wavelength air Wavelength water = wavelength air x 0.750 = 0.375 11....
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## This note was uploaded on 10/25/2009 for the course PHYSICS 2130 taught by Professor Zhixianzhou, during the Winter '09 term at Wayne State University.

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Chapter 11 Waves - rad/sec = 1.05 10^-2s What is the velocity V= wavelength/t = 1.05/1.05*10^2 = 100m/s What is the direction of the wave Negative

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