removing problem statements

1 files changed, 338 insertions, 341 deletions

diff --git a/A_Comprehensive_Textbook_Of_Applied_Physics_/Chapter2.ipynb b/A_Comprehensive_Textbook_Of_Applied_Physics_/Chapter2.ipynb
index 7c9499cb..b50ddf47 100644
--- a/A_Comprehensive_Textbook_Of_Applied_Physics_/Chapter2.ipynb
+++ b/A_Comprehensive_Textbook_Of_Applied_Physics_/Chapter2.ipynb
@@ -1,342 +1,339 @@
-{

- "metadata": {

-  "name": ""

- },

- "nbformat": 3,

- "nbformat_minor": 0,

- "worksheets": [

-  {

-   "cells": [

-    {

-     "cell_type": "heading",

-     "level": 1,

-     "metadata": {},

-     "source": [

-      "UNIT-2:Application of Sound Waves"

-     ]

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.1,Page no:41"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Calculate reverberation time\n",

-      "\n",

-      "#Variable declaration\n",

-      "v=3000              #volume in metre cube.\n",

-      "theta=0.2           #theta in owu(open window unit).\n",

-      "s=1850              #area in metre cube.\n",

-      "\n",

-      "#Calculation\n",

-      "a=theta*s     #calculating total absorbtion of surface.\n",

-      "T=(0.165*v)/a #calculating T using Sabine formula\n",

-      "\n",

-      "#Result\n",

-      "print\"Reverberation time of Room = \",round(T,2) ,\"sec\"    \n"

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Reverberation time of Room =  1.34 sec\n"

-       ]

-      }

-     ],

-     "prompt_number": 11

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.2,Page no:41"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Calculate average absorbing power\n",

-      "\n",

-      "#Variable declaration\n",

-      "v=120000                            #volume in metre cube.\n",

-      "t=1.5                               #time in second.\n",

-      "s=25000                             #area in metre cube.\n",

-      "\n",

-      "#Calculation\n",

-      "a=(0.16*v)/(t*s)                   #using Sabine formula for calculating a\n",

-      "\n",

-      "#Variable declaration\n",

-      "print\"Average Absorbing Power of Surface = \",a,\"o w u\"   "

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Average Absorbing Power of Surface =  0.512 o w u\n"

-       ]

-      }

-     ],

-     "prompt_number": 39

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.3,Page no:42"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Reverberation time of cinema hall\n",

-      "\n",

-      "#Variable declaration\n",

-      "v=6000.0                    #Volume in metre cube.\n",

-      "a=20.0                     #surface absorbtion in owu(open window unit).\n",

-      "\n",

-      "#Calculation\n",

-      "T=(0.165*v)/(a)            #calculating T using Sabine Formula.\n",

-      "\n",

-      "#Result\n",

-      "print\"Reverberation Time = \",T,\"sec\"\n",

-      "print\"\\nNOTE:Calculation mistake in book\""

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Reverberation Time =  49.5 sec\n",

-        "\n",

-        "NOTE:Calculation mistake in book\n"

-       ]

-      }

-     ],

-     "prompt_number": 37

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.4,Page no:42"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Reverberation time with persons\n",

-      "\n",

-      "#Variable declaration\n",

-      "v=3500                  #volume in metre cube.\n",

-      "n1=370-300              #no. of audience on wooden seats.\n",

-      "n2=300-70               #no. of empty wooden seats.\n",

-      "\n",

-      "#Calculation\n",

-      "a1s1=0.04*60            #absorption due to wooden doors.\n",

-      "a2s2=0.03*700           #absorption due to plastered walls.\n",

-      "a3s3=0.06*50            #absorption due to glass work.\n",

-      "a4s4=4.2*370            #absorption due to audience on spungy and wooden \n",

-      "#seats.\n",

-      "a5s5=2*230               #absorption due to empty seats.\n",

-      "sum=a1s1+a2s2+a3s3+a4s4+a5s5  #total absorption of cinema hall.\n",

-      "T=(0.165*v)/sum          #calculating T using Sabine Formula.\n",

-      "\n",

-      "#Result\n",

-      "print\"Reverberation Time = \",round(T,2),\"sec\"       "

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Reverberation Time =  0.28 sec\n"

-       ]

-      }

-     ],

-     "prompt_number": 40

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.5,Page no:49"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Frequency of ultrasonics\n",

-      "\n",

-      "import math\n",

-      "\n",

-      "#Variable declaration\n",

-      "l=10                           #length in centimetres.\n",

-      "Y=20*10**11                     #Young's Modulus in dyne/cm square.\n",

-      "R=8                            #Density in gram/cc\n",

-      "\n",

-      "#Calculation\n",

-      "n=(1.0/(2*l))*math.sqrt(Y/R)  #calculating frequency of vibration using \n",

-      "#young's modulus.\n",

-      "\n",

-      "#Result\n",

-      "print\"Frequency of vibration=\",n,\"Hz\"       "

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Frequency of vibration= 25000.0 Hz\n"

-       ]

-      }

-     ],

-     "prompt_number": 28

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.6,Page no:50"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Fundamental frequency of vibration\n",

-      "\n",

-      "import math\n",

-      "\n",

-      "#Variable declaration\n",

-      "t=0.1                #thickness in centimetre.\n",

-      "Y=8.75*10**11         #Young's Modulus in dyne/cm square.\n",

-      "R=2.654              #Density in gram/cm square.\n",

-      "\n",

-      "#Calculation\n",

-      "n=(1/(2*t))*math.sqrt(Y/R)      #calculating frequency using Young's modulus.\n",

-      "\n",

-      "#Result\n",

-      "print\"Frequency of Vibration=\",round(n),\"Hz\"    "

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Frequency of Vibration= 2870936.0 Hz\n"

-       ]

-      }

-     ],

-     "prompt_number": 26

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.7,Page no:50"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Speed of sound wave in water\n",

-      "\n",

-      "#Variable declaration\n",

-      "K=2.026*10**9               #Bulk Modulus in N/m square.\n",

-      "R=10**3                     #Density in Kg/m cube.\n",

-      "\n",

-      "#Calculation\n",

-      "V=math.sqrt(K/R)                #Calculating speed using Bulk Modulus.\n",

-      "\n",

-      "#Result\n",

-      "print\"Velocity of sound waves in water = \",round(V,2),\"m/sec\"     \n"

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Velocity of sound waves in water =  1423.38 m/sec\n"

-       ]

-      }

-     ],

-     "prompt_number": 18

-    },

-    {

-     "cell_type": "heading",

-     "level": 2,

-     "metadata": {},

-     "source": [

-      "Example no:2.8,Page no:51"

-     ]

-    },

-    {

-     "cell_type": "code",

-     "collapsed": false,

-     "input": [

-      "#Speed of ultrasonic wave in air\n",

-      "\n",

-      "import math\n",

-      "\n",

-      "#Variable declaration\n",

-      "Y=1.41             #Young's Modulus.\n",

-      "R=1.293*10**-3      #Density of air in g/centimetre cube.\n",

-      "P=76*13.6*980      #atmospheric pressure in dyne/cm square.\n",

-      "\n",

-      "#Calculation\n",

-      "V=math.sqrt((Y*P)/R)     #calculating speed using young's modulus.\n",

-      "\n",

-      "#Result\n",

-      "print\"Speed of ultrasonic wave in air at n.t.p=\",round(V*10**-2,1),\"m/sec\"   "

-     ],

-     "language": "python",

-     "metadata": {},

-     "outputs": [

-      {

-       "output_type": "stream",

-       "stream": "stdout",

-       "text": [

-        "Speed of ultrasonic wave in air at n.t.p= 332.4 m/sec\n"

-       ]

-      }

-     ],

-     "prompt_number": 16

-    }

-   ],

-   "metadata": {}

-  }

- ]

+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:bc446a4cb1141cc1fc3a73e237c82b9c455db1185763ba734b760bbf57d3288c"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "UNIT-2:Application of Sound Waves"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.1,Page no:41"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\n",
+      "#Variable declaration\n",
+      "v=3000              #volume in metre cube.\n",
+      "theta=0.2           #theta in owu(open window unit).\n",
+      "s=1850              #area in metre cube.\n",
+      "\n",
+      "#Calculation\n",
+      "a=theta*s     #calculating total absorbtion of surface.\n",
+      "T=(0.165*v)/a #calculating T using Sabine formula\n",
+      "\n",
+      "#Result\n",
+      "print\"Reverberation time of Room = \",round(T,2) ,\"sec\"    \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Reverberation time of Room =  1.34 sec\n"
+       ]
+      }
+     ],
+     "prompt_number": 11
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.2,Page no:41"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "#Variable declaration\n",
+      "v=120000                            #volume in metre cube.\n",
+      "t=1.5                               #time in second.\n",
+      "s=25000                             #area in metre cube.\n",
+      "\n",
+      "#Calculation\n",
+      "a=(0.16*v)/(t*s)                   #using Sabine formula for calculating a\n",
+      "\n",
+      "#Variable declaration\n",
+      "print\"Average Absorbing Power of Surface = \",a,\"o w u\"   "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Average Absorbing Power of Surface =  0.512 o w u\n"
+       ]
+      }
+     ],
+     "prompt_number": 39
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.3,Page no:42"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\n",
+      "#Variable declaration\n",
+      "v=6000.0                    #Volume in metre cube.\n",
+      "a=20.0                     #surface absorbtion in owu(open window unit).\n",
+      "\n",
+      "#Calculation\n",
+      "T=(0.165*v)/(a)            #calculating T using Sabine Formula.\n",
+      "\n",
+      "#Result\n",
+      "print\"Reverberation Time = \",T,\"sec\"\n",
+      "print\"\\nNOTE:Calculation mistake in book\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Reverberation Time =  49.5 sec\n",
+        "\n",
+        "NOTE:Calculation mistake in book\n"
+       ]
+      }
+     ],
+     "prompt_number": 37
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.4,Page no:42"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "v=3500                  #volume in metre cube.\n",
+      "n1=370-300              #no. of audience on wooden seats.\n",
+      "n2=300-70               #no. of empty wooden seats.\n",
+      "\n",
+      "#Calculation\n",
+      "a1s1=0.04*60            #absorption due to wooden doors.\n",
+      "a2s2=0.03*700           #absorption due to plastered walls.\n",
+      "a3s3=0.06*50            #absorption due to glass work.\n",
+      "a4s4=4.2*370            #absorption due to audience on spungy and wooden \n",
+      "#seats.\n",
+      "a5s5=2*230               #absorption due to empty seats.\n",
+      "sum=a1s1+a2s2+a3s3+a4s4+a5s5  #total absorption of cinema hall.\n",
+      "T=(0.165*v)/sum          #calculating T using Sabine Formula.\n",
+      "\n",
+      "#Result\n",
+      "print\"Reverberation Time = \",round(T,2),\"sec\"       "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Reverberation Time =  0.28 sec\n"
+       ]
+      }
+     ],
+     "prompt_number": 40
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.5,Page no:49"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\n",
+      "import math\n",
+      "\n",
+      "#Variable declaration\n",
+      "l=10                           #length in centimetres.\n",
+      "Y=20*10**11                     #Young's Modulus in dyne/cm square.\n",
+      "R=8                            #Density in gram/cc\n",
+      "\n",
+      "#Calculation\n",
+      "n=(1.0/(2*l))*math.sqrt(Y/R)  #calculating frequency of vibration using \n",
+      "#young's modulus.\n",
+      "\n",
+      "#Result\n",
+      "print\"Frequency of vibration=\",n,\"Hz\"       "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Frequency of vibration= 25000.0 Hz\n"
+       ]
+      }
+     ],
+     "prompt_number": 28
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.6,Page no:50"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "import math\n",
+      "\n",
+      "#Variable declaration\n",
+      "t=0.1                #thickness in centimetre.\n",
+      "Y=8.75*10**11         #Young's Modulus in dyne/cm square.\n",
+      "R=2.654              #Density in gram/cm square.\n",
+      "\n",
+      "#Calculation\n",
+      "n=(1/(2*t))*math.sqrt(Y/R)      #calculating frequency using Young's modulus.\n",
+      "\n",
+      "#Result\n",
+      "print\"Frequency of Vibration=\",round(n),\"Hz\"    "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Frequency of Vibration= 2870936.0 Hz\n"
+       ]
+      }
+     ],
+     "prompt_number": 26
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.7,Page no:50"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\n",
+      "#Variable declaration\n",
+      "K=2.026*10**9               #Bulk Modulus in N/m square.\n",
+      "R=10**3                     #Density in Kg/m cube.\n",
+      "\n",
+      "#Calculation\n",
+      "V=math.sqrt(K/R)                #Calculating speed using Bulk Modulus.\n",
+      "\n",
+      "#Result\n",
+      "print\"Velocity of sound waves in water = \",round(V,2),\"m/sec\"     \n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Velocity of sound waves in water =  1423.38 m/sec\n"
+       ]
+      }
+     ],
+     "prompt_number": 18
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example no:2.8,Page no:51"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\n",
+      "import math\n",
+      "\n",
+      "#Variable declaration\n",
+      "Y=1.41             #Young's Modulus.\n",
+      "R=1.293*10**-3      #Density of air in g/centimetre cube.\n",
+      "P=76*13.6*980      #atmospheric pressure in dyne/cm square.\n",
+      "\n",
+      "#Calculation\n",
+      "V=math.sqrt((Y*P)/R)     #calculating speed using young's modulus.\n",
+      "\n",
+      "#Result\n",
+      "print\"Speed of ultrasonic wave in air at n.t.p=\",round(V*10**-2,1),\"m/sec\"   "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Speed of ultrasonic wave in air at n.t.p= 332.4 m/sec\n"
+       ]
+      }
+     ],
+     "prompt_number": 16
+    }
+   ],
+   "metadata": {}
+  }
+ ]
 }
\ No newline at end of file