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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 1:Materials Properties and Requirements "
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 1.1, page no-8"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Resistance of the wire\n",
+      "\n",
+      "import math\n",
+      "#variable declaration\n",
+      "r=0.45*10**-3           # radius of the wire\n",
+      "L=0.3                   # length of the wire\n",
+      "rho=17.0*10**-9         # resistivity of wire in ohm-m \n",
+      "\n",
+      "#Calculations\n",
+      "R=rho*(L/(math.pi*r**2))\n",
+      "\n",
+      "#Result\n",
+      "print('The resistance of the wire is %.3f ohm'%R)\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The resistance of the wire is 0.008 ohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 1.2, page no-8"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Extension of a wire\n",
+      "\n",
+      "import math\n",
+      "#variable declaration\n",
+      "r=1.25*10**-3         # radius of the wire in m\n",
+      "L=3.0                 # length of wire in m\n",
+      "F=4900.0              # applied force in Newton\n",
+      "e=2.05*10**11         # modulus of elasticity\n",
+      "\n",
+      "#calculation\n",
+      "s=F/(math.pi*r**2*e)\n",
+      "\n",
+      "#result\n",
+      "print('strain = %.3f\\nTherefore, extension = %.3f m'%(s,s*3))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "strain = 0.005\n",
+        "Therefore, extension = 0.015 m\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file