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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "CHAPTER 1 : Basic Principles"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Ex1.2 : PG-9 "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# initialization of variables\n",
      "m=10 # mass in Kg\n",
      "V=5 # velocity in m/s\n",
      "\n",
      "KE=m*V**2/2 # kinetic energy in N-m \n",
      "print \"The Kinetic Energy is \",round(KE),\" N.m\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The Kinetic Energy is  125.0  N.m\n"
       ]
      }
     ],
     "prompt_number": 77
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Ex1.3 : PG-10"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# initialization of variables\n",
      "V= 3*5*20; # Volume of air in m^3 from dimensions\n",
      "m= 350.0; # mass in kg\n",
      "g= 9.81; # gavitational acceleration in m/s^2\n",
      "\n",
      "rho=m/V;# density\n",
      "print \" The Density is \",round(rho,3),\"kg/m^3 \\n\"\n",
      "\n",
      "v= 1/rho # specific volume of air\n",
      "print \" The specific volume  is\", round(v,3),\"m^3/kg \\n\"\n",
      "\n",
      "gama= rho*g # specific weight of air\n",
      "print \" The specific weight is\", round(gama,2),\" N/m^3\"\n",
      "\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        " The Density is  1.167 kg/m^3 \n",
        "\n",
        " The specific volume  is 0.857 m^3/kg \n",
        "\n",
        " The specific weight is 11.45  N/m^3\n"
       ]
      }
     ],
     "prompt_number": 78
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Ex1.4 : PG-13"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# initialization of variables\n",
      "h=0.020 # height of mercury in m\n",
      "gammawater=9810 # specific weight of water in N/m^3\n",
      "Patm=0.7846*101.3 # atmospheric pressure in kPa from table B.1\n",
      "\n",
      "Pgauge=13.6*gammawater*h/1000 # pressure in Pascal from condition gammaHg=13.6*gammawater\n",
      "\n",
      "P=(Pgauge+Patm)# absolute pressure in KPa\n",
      "#result\n",
      "print \"The Pressure is\",round(P,2),\" kPa\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The Pressure is 82.15  kPa\n"
       ]
      }
     ],
     "prompt_number": 79
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Ex1.5 : PG-13"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "# initialization of variables\n",
      "d=10.0/100 # diameter of cylinder in 'm'\n",
      "P=600 # pressure in KPa\n",
      "Patm=100 # atmospheric pressure in Kpa\n",
      "K=4.8*1000 # spring constant in N/m \n",
      "\n",
      "deltax=(P-Patm)*(math.pi*1000*d**2)/(4*K) # by balancing forces on piston\n",
      "#result\n",
      "print \"The Compression in spring is\",round(deltax,3),\" m\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The Compression in spring is 0.818  m\n"
       ]
      }
     ],
     "prompt_number": 80
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Ex1.6 : PG-16"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# initialization of variables\n",
      "ma=2200 # mass of Automobile 'a' in kg\n",
      "va=25 #velocity of Automobile 'a' in m/s before collision\n",
      "va1=13.89 # velocity of Automobile 'a' after collision in m/s\n",
      "mb=1000 # mass of Automobile 'b' in kg\n",
      "vb=24.44 #velocity of Automobile 'b' after collision in m/s\n",
      "\n",
      "KE1=(ma*va**2)/2 # kinetic energy before collision\n",
      "KE2=(ma*va1**2)/2+(mb*vb**2)/2 # kinetic energy after collision\n",
      "U=(KE1-KE2)/1000 # internal energy from conservation of energy principle in kJ\n",
      "#result\n",
      "print \"The increase in kinetic energy is of\",round(U,1),\" kJ\"\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The increase in kinetic energy is of 176.6  kJ\n"
       ]
      }
     ],
     "prompt_number": 81
    }
   ],
   "metadata": {}
  }
 ]
}