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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 3: Ultrasonics"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.1, Page 74"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Variable Declaration\n",
+      "t=1.6*1e-3 #thickness in meter\n",
+      "v=5760. #velocity in m/s\n",
+      "\n",
+      "#Calculations\n",
+      "lemda=2*t#wavelength\n",
+      "f=v/lemda#fundamental frequency \n",
+      "\n",
+      "#Result\n",
+      "print 'fundamental frequency =',f/1e6,'MHz'\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "fundamental frequency = 1.8 MHz\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.2, Page 75"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Variable Declaration\n",
+      "t=40*1e-2;\n",
+      "#pulse covers 2x distance in arriving back\n",
+      "#so,  30*1e-6=2*x/v\n",
+      "#and, 2nd pulse will cover a distance of 2*40 cm in 80*1e-6 seconds\n",
+      "#therfore,  80*1e-6=(2*40*1e-2)/v\n",
+      "#compare both equation\n",
+      "e1=30;\n",
+      "e2=40*2\n",
+      "\n",
+      "#Calculation\n",
+      "x=e1*t*2/(2*e2);\n",
+      "\n",
+      "#Result\n",
+      "print 'distance of the flow from near end =',x/1e-2,'cm' \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "distance of the flow from near end = 15.0 cm\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.3, Page 76"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Variable Declaration\n",
+      "f_diff=50*1e3 #in Hz\n",
+      "v=5000 #in m/s\n",
+      "\n",
+      "#Calculations\n",
+      "#f1=v/2*t\n",
+      "#f2=2v/2t\n",
+      "#f2-f1=v/2t\n",
+      "t=v/(2*f_diff)\n",
+      "\n",
+      "#Result\n",
+      "print 'Thickness of steel plate =',t,'m'\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Thickness of steel plate = 0.05 m\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 3.4, Page 77"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from math import pi\n",
+      "\n",
+      "#Variable Declaration\n",
+      "f=1e6 #frequency in Hz\n",
+      "L=1 #inductance in henry\n",
+      "\n",
+      "#Calculation\n",
+      "#f=(1/2*pi)*(sqrt(1/(L*C)))\n",
+      "c=1/(4*pi**2*f**2*L);#capacitance\n",
+      "\n",
+      "#Result\n",
+      "print 'capacitance =',round(c/1e-12,3),'pF'\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "capacitance = 0.025 pF\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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