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Course: PH 223, Winter 2008
School: Portland
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WAVE 1. PROPAGATION (Worth 2 points for the midterm exam) A long string has linear mass density 0f 556 gr/m and is stretched with a tension of 5 Newtons. 1.A A pulse is propagating to the right of the x-axis. At t=0 the shape of the wave is described by the function Y ( x) = meters) 4 [e + e - x ]2 x (when x is in meters, the vertical displacement Y is also in Draw (on sale) the exact shape of the string at...

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WAVE 1. PROPAGATION (Worth 2 points for the midterm exam) A long string has linear mass density 0f 556 gr/m and is stretched with a tension of 5 Newtons. 1.A A pulse is propagating to the right of the x-axis. At t=0 the shape of the wave is described by the function Y ( x) = meters) 4 [e + e - x ]2 x (when x is in meters, the vertical displacement Y is also in Draw (on sale) the exact shape of the string at t=0 (Y vs x) Find the velocity at which the pulse is moving. 1.B 1.C Draw the shape of the wave at t = 1 seconds and indicate the x-position of the string that has the maximum vertical displacement. Write the function Y ( x, t ) that describes the shape of the string at any time "t". 2. SUPERPOSITION OF WAVES (Worth 3 points for the midterm exam) A string has linear mass density 0f 556 gr/m and is stretched with a tension 5 of Newtons. There exist two pulses propagating along the string, one to the right the other to the left. Each pulse has the form Y ( x vt ) , where Y ( x) = [e x - x0 A + e -( x- x0 ) ]2 A= 4m for the pulse moving to the right, and A= - 4m for the one moving to the left. The corresponding value of xo for each pulse will depend on the initial conditions. (When x is in meters, the vertical displacement Y is also in meters.). 3A At t = - 1second, the pulse moving to the right has its maximum vertical ...

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# This file is autogenerated. Instead of editing this file, please use the# migrations feature of ActiveRecord to incrementally modify your database, and# then regenerate this schema definition.ActiveRecord:Schema.define(:version =&gt; 19) do cre
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# Methods added to this helper will be available to all templates in the application.module ApplicationHelperend
DePaul - APP - 394
module CategoryHelperend
DePaul - APP - 394
module IngredientControllerHelperend
DePaul - APP - 394
module IngredientHelperend
DePaul - APP - 394
DePaul - APP - 394
module MeasuringUnitHelperend
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module RecipeHelperend
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module RecipesHelperend
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module SizeHelperend
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module UsersHelperend
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class CreateIngredients &lt; ActiveRecord:Migration def self.up create_table :ingredients do |t| t.column :name, :string, :null =&gt; false end end def self.down drop_table :ingredients endend
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class CreateMeasuringUnits &lt; ActiveRecord:Migration def self.up create_table :measuring_units do |t| t.column :name, :string, :null =&gt; false end end def self.down drop_table :measuring_units endend