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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:b9f90dbe8cdd3ac15f14ed9a5dcea4d99b8c522db4806d23bf359fc881d94c73"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter1-Fundamental concepts"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1-pg18"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#calculate denisty of air and its mass\n",
+      "p=2.*10**5; ## Pa\n",
+      "T=300.; ## K\n",
+      "R=287.; ## J/(kg.K)\n",
+      "V=3.; ## m^3\n",
+      "\n",
+      "rho=p/(R*T);\n",
+      "print'%s %.2f %s'%('The density of air =',rho,'kg/m^3')\n",
+      "m=rho*V;\n",
+      "print'%s %.2f %s'%('Its mass =',m,'m^3')\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The density of air = 2.32 kg/m^3\n",
+        "Its mass = 6.97 m^3\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex2-pg19"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#calculate gas constant Co ,Co2 ,No,N2o\n",
+      "M_C=12.;\n",
+      "M_N=14.;\n",
+      "M_O=16.;\n",
+      "R=8314.; ## J/(kg.K)\n",
+      "\n",
+      "M_CO=M_C+M_O;\n",
+      "R_CO=R/M_CO;\n",
+      "\n",
+      "M_CO2=M_C+2.*M_O;\n",
+      "R_CO2=R/M_CO2;\n",
+      "\n",
+      "M_NO=M_N+M_O;\n",
+      "R_NO=R/M_NO;\n",
+      "\n",
+      "M_N2O=2.*M_N+M_O;\n",
+      "R_N2O=R/M_N2O;\n",
+      "\n",
+      "print'%s %.1f %s'%('Gas constant for CO =',R_CO,'J/(kg.K)')\n",
+      "print'%s %.1f %s'%('Gas constant for CO2 =',R_CO2,'J/(kg.K)')\n",
+      "print'%s %.1f %s'%(\"Gas constant for NO =\",R_NO,\"J/(kg.K)\")\n",
+      "print'%s %.1f %s'%(\"Gas constant for N2O =\",R_N2O,\"J/(kg.K)\")\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Gas constant for CO = 296.9 J/(kg.K)\n",
+        "Gas constant for CO2 = 189.0 J/(kg.K)\n",
+        "Gas constant for NO = 277.1 J/(kg.K)\n",
+        "Gas constant for N2O = 189.0 J/(kg.K)\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex3-pg36"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#calculate reynodls number and prove the \n",
+      "d=0.004; ## m\n",
+      "rho=1000; ## kg/m^3\n",
+      "v=3; ## m/s\n",
+      "meu=10**(-3); ## khm(m.s)\n",
+      "\n",
+      "Re=rho*v*d/meu; \n",
+      "print'%s %.f %s'%(\"Reynolds number =\",Re,\"\")\n",
+      "\n",
+      "print(\"The Reynolds number is well in excess of 4000, so the flow is turbulent.\")"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Reynolds number = 12000 \n",
+        "The Reynolds number is well in excess of 4000, so the flow is turbulent.\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file