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+{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 2 - Work"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1 - Pg 16"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Calculate the net work done\n",
+ "#Initialization of variables\n",
+ "from numpy import math\n",
+ "g=1.4 #Gamma\n",
+ "P=100. #psia\n",
+ "V1=3. #cu ft\n",
+ "Pf=20. #psia\n",
+ "#calculations\n",
+ "V2=V1*math.pow((P/Pf),(1/g))\n",
+ "W=(Pf*V2-P*V1)*144./(1-g)\n",
+ "#results\n",
+ "print '%s %d %s' %(\"Net work done =\",W,\"ft lb\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Net work done = 39810 ft lb\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2 - Pg 17"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Calculate the net work done\n",
+ "#Initialization of variables\n",
+ "Wb=-33000. #ft-lb\n",
+ "V2=3. #cu ft\n",
+ "V1=1. #cu ft\n",
+ "P=69.4 #psia\n",
+ "#calculations\n",
+ "Wa=P*(V2-V1)*144.\n",
+ "W=Wa+Wb\n",
+ "#results\n",
+ "print '%s %d %s' %(\"Net work done =\",W,\"ft-lb\")\n",
+ "print '%s' %(\"The answer is a bit different due to rounding off error in textbook\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Net work done = -13012 ft-lb\n",
+ "The answer is a bit different due to rounding off error in textbook\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3 - Pg 20"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Calculate the net work done\n",
+ "import math\n",
+ "#Initialization of variables\n",
+ "b=11. #in\n",
+ "s=15. #in\n",
+ "l=2.4 #in\n",
+ "k=80. #psi per in\n",
+ "#calculations\n",
+ "a=math.pi*b*b /4\n",
+ "L=s/12.\n",
+ "Pm=1.6/l *k\n",
+ "W=Pm*a*L\n",
+ "#results\n",
+ "print '%s %d %s' %(\"Net work done =\",W,\"ft lb\")\n",
+ "print '%s' %(\"The answer is a bit different due to rounding off error in textbook\")\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Net work done = 6335 ft lb\n",
+ "The answer is a bit different due to rounding off error in textbook\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file