Fall 07 Phys 143l HW 1

Fall 07 Phys 143l HW 1 - Duke University Department of...

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Duke University Department of Physics Physics 143 Fall Term 2007 HOMEWORK 1 Available: August 27 Due: September 3 at the beginning of class. Please don’t forget to write your name on your solutions! You must always show your work for credit. Problem 1: Introduce Yourself By next Monday, please send me an email (schol@phy.duke.edu) intro- ducing yourself, indicating: Your major or planned major (if you know it). Your long term professional interests (if you know them). What physics courses and math courses you’ve had previously, at Duke or elsewhere. Anything else you would like me to know about you, e.g. how to pronounce your name correctly, activities you are involved in, etc. Problem 2: Wave Review a. A cord has two sections with linear densities of 0.10 kg/m and 0.20 kg/m. An incident wave, given by D = (0 . 050 m) sin(0 . 6 x - 12 . 0 t ), where x is in meters and t is in seconds, travels along the lighter cord. What is the wavelength on the lighter section of the cord? What is the
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Fall 07 Phys 143l HW 1 - Duke University Department of...

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