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+{
+ "metadata": {
+  "name": "",
+  "signature": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 01 : Standards, Units & Dimensions"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1.17 : page 56"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "Y=90.0 \n",
+      "X=89.0 \n",
+      "Error_absolute=Y-X \n",
+      "print 'absolute Error =',Error_absolute\n",
+      "Error_relative=(Y-X)*100/Y \n",
+      "print 'relative Error =',round(Error_relative,2),'%'\n",
+      "Accuracy_relative=1-Error_relative \n",
+      "print 'Accuracy relative =',round(Accuracy_relative,2)\n",
+      "Accuracy_percentage=100*Accuracy_relative \n",
+      "print 'Accuracy =',round(Accuracy_percentage,2),'%'"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "absolute Error = 1.0\n",
+        "relative Error = 1.11 %\n",
+        "Accuracy relative = -0.11\n",
+        "Accuracy = -11.11 %\n"
+       ]
+      }
+     ],
+     "prompt_number": 7
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1.18 : page "
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from __future__ import division\n",
+      "S=98+100+102+98+100+100+104+104+105+97 \n",
+      "n=10 \n",
+      "Avg=S/n \n",
+      "P=1-abs((104-Avg)/Avg) \n",
+      "print \"Precision for the 8th reading=%.2f\"%P"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Precision for the 8th reading=0.97\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1.19 : page "
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "V=10 \n",
+      "I=20*10**-3 \n",
+      "RI=50 \n",
+      "R=(V/I)-RI \n",
+      "print \"The value of Resistance = %.0f ohm\"%R \n",
+      "dV=0.2 \n",
+      "dI=1*10**-3 \n",
+      "dRI=5 \n",
+      "dR=(dV/I)+(V*dI/I**2)+(dRI)\n",
+      "print \"Limiting error of resistance = %.0f ohm\"%dR"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The value of Resistance = 450 ohm\n",
+        "Limiting error of resistance = 40 ohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 9
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1.20 : page "
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "R0=5 \n",
+      "a=0.004 \n",
+      "T=30 \n",
+      "R=R0*(1+a*(T-20)) \n",
+      "print \"Resistance of the wire = %.1f ohm\"%R \n",
+      "#Let (dR/dR0) =b   (dR/da)=c   (dR/dT)=d\n",
+      "b=(1+a*(T-20)) \n",
+      "c=R0*(T-20) \n",
+      "d=R0*a \n",
+      "ur0=5*0.003 \n",
+      "ua=0.004*0.01 \n",
+      "ut=1 \n",
+      "uR=(b**2*ur0**2+c**2*ua**2+d**2*ut**2)**0.5 \n",
+      "print \"Uncertanity in resistance = %.2f ohm\"%uR"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Resistance of the wire = 5.2 ohm\n",
+        "Uncertanity in resistance = 0.03 ohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 11
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1.21 : page "
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "X_mean=(15+20+25+30+35+45)/6 \n",
+      "print \"The sample mean of the temperature=%.2f degree C\"%X_mean \n",
+      "Y_mean=(1.9+1.93+1.97+2+2.01+2.01+1.94+1.95+1.97+2.02+2.02+2.04)/12*10**-6 \n",
+      "print \"The sample mean of the faliure=%.6f failures/hour\"%Y_mean\n",
+      "print 'from these values we get' \n",
+      "a=1.80*10**-6 \n",
+      "b=0.00226 \n",
+      "print 'Y=1.80+0.00226x is the required least square line'"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The sample mean of the temperature=28.33 degree C\n",
+        "The sample mean of the faliure=0.000002 failures/hour\n",
+        "from these values we get\n",
+        "Y=1.80+0.00226x is the required least square line\n"
+       ]
+      }
+     ],
+     "prompt_number": 12
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1.22 : page "
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "n=2 \n",
+      "k=1 \n",
+      "dof=n-k \n",
+      "chi_square=(3-5)**2/5+(7-5)**2/5 \n",
+      "print 'Chi square value =',chi_square\n",
+      "print 'From the dof and chi square value we find P=0.22'\n",
+      "print 'Hence there are 22% chance that the distribution is just the result of random fluctuations and the coin may be unweighted'"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Chi square value = 1.6\n",
+        "From the dof and chi square value we find P=0.22\n",
+        "Hence there are 22% chance that the distribution is just the result of random fluctuations and the coin may be unweighted\n"
+       ]
+      }
+     ],
+     "prompt_number": 13
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1.23 : page "
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "X_mean=501*1/5 \n",
+      "print \"Assigned Value=%.1f V\"%X_mean \n",
+      "sigma=((1/(5-1))*((100.2-X_mean)**2+(100.3-X_mean)**2+(100.2-X_mean)**2+(100.2-X_mean)**2+(100.1-X_mean)**2))**0.5 \n",
+      "# For 95% confidance level student factor t is 2.78'\n",
+      "t=2.78 \n",
+      "n=5 \n",
+      "Ur=t*sigma/(n**0.5) \n",
+      "print \"Uncertanity=%.3f V\"%Ur "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Assigned Value=100.2 V\n",
+        "Uncertanity=0.088 V\n"
+       ]
+      }
+     ],
+     "prompt_number": 23
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}