From 92cca121f959c6616e3da431c1e2d23c4fa5e886 Mon Sep 17 00:00:00 2001
From: hardythe1
Date: Tue, 7 Apr 2015 15:58:05 +0530
Subject: added books

---
 Engineering_Physics_/Chapter5.ipynb | 170 ++++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100755 Engineering_Physics_/Chapter5.ipynb

(limited to 'Engineering_Physics_/Chapter5.ipynb')

diff --git a/Engineering_Physics_/Chapter5.ipynb b/Engineering_Physics_/Chapter5.ipynb
new file mode 100755
index 00000000..781fd57b
--- /dev/null
+++ b/Engineering_Physics_/Chapter5.ipynb
@@ -0,0 +1,170 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:4126f9237f2a14d1c68d93136eb798698a28e20e098ed4ce42f02e377a8fbabb"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "5: Acoustics"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example number 5.1, Page number 97"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#importing modules\n",
+      "import math\n",
+      "from __future__ import division\n",
+      "\n",
+      "#Variable declaration\n",
+      "T1=1.5;     #R time for empty hall(s)\n",
+      "T2=1;       #R time with curtain cloth(s)\n",
+      "A=20;       #area of absorber(sq.m)\n",
+      "V=10*8*6;   #volume of hall(cu.m)\n",
+      "\n",
+      "#Calculation\n",
+      "a=((0.161*V)/(2*A))*((1/T2)-(1/T1));   #absorption coefficient\n",
+      "\n",
+      "#Result\n",
+      "print \"absorption coefficient is\",round(a,2),\"Sabines\"\n",
+      "print \"answer given in the book varies due to rounding off errors\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "absorption coefficient is 0.64 Sabines\n",
+        "answer given in the book varies due to rounding off errors\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example number 5.2, Page number 97"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#importing modules\n",
+      "import math\n",
+      "from __future__ import division\n",
+      "\n",
+      "#Variable declaration\n",
+      "V=20*15*10;    #volume of hall(cu.m)\n",
+      "T1=3.5;        #reverberation time(s)\n",
+      "l=20;        \n",
+      "b=15;\n",
+      "h=10;      #dimensions of hall\n",
+      "am=0.5;     #absorption coefficient\n",
+      "T2=2.5;    #reverberation time after cloth use(s)\n",
+      "\n",
+      "\n",
+      "#Calculation\n",
+      "A=(0.161*V)/T1; \n",
+      "S=2*((l*b)+(b*h)+(h*l));    #surface area(sq.m)\n",
+      "sigma_a=A/S;   #average absorption coefficient of hall(o.w.u)\n",
+      "S1=(((0.161*V)/(am-sigma_a))*((1/T2)-(1/T1)));     #area of wall covered by curtain cloth(sq.m)\n",
+      "\n",
+      "#Result\n",
+      "print \"average absorption coefficient of hall is\",round(sigma_a,3),\"o.w.u\"\n",
+      "print \"area of wall covered by curtain cloth is\",round(S1,3),\"sq.m\"\n",
+      "print \"answer for area covered S1 varies due to rounding off errors\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "average absorption coefficient of hall is 0.106 o.w.u\n",
+        "area of wall covered by curtain cloth is 140.156 sq.m\n",
+        "answer for area covered S1 varies due to rounding off errors\n"
+       ]
+      }
+     ],
+     "prompt_number": 8
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example number 5.3, Page number 98"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#importing modules\n",
+      "import math\n",
+      "from __future__ import division\n",
+      "\n",
+      "#Variable declaration\n",
+      "V=1450;    #volume of hall(cu.m)\n",
+      "A1=112*0.03;   #absorption due to plastered wall\n",
+      "A2=130*0.06;   #absorption due to wooden floor\n",
+      "A3=170*0.04;   #absorption due to plastered ceiling\n",
+      "A4=20*0.06;    #absorption due to wooden door\n",
+      "A5=100*1;      #absorption due to cushioned chairs\n",
+      "\n",
+      "#Calculation\n",
+      "sigma_as=A1+A2+A3+A4+A5;   #total absorption in empty hall\n",
+      "T1=(0.161*V)/sigma_as;     #reverberation time case-1(s)\n",
+      "T2=(0.161*V)/(sigma_as+(60*4.7));   #persons=60,A=4.7 case-2\n",
+      "T3=(0.161*V)/(sigma_as+(100*4.7));  #seat cushioned=100 case-3\n",
+      "\n",
+      "#Result\n",
+      "print \"reverberation time for case-1 is\",round(T1,3),\"sec\"\n",
+      "print \"reverberation time for case-2 is\",round(T2,3),\"sec\"\n",
+      "print \"reverberation time for case-3 is\",round(T3,3),\"sec\"\n",
+      "print \"answer for T3 given in the book is wrong\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "reverberation time for case-1 is 1.959 sec\n",
+        "reverberation time for case-2 is 0.582 sec\n",
+        "reverberation time for case-3 is 0.396 sec\n",
+        "answer for T3 given in the book is wrong\n"
+       ]
+      }
+     ],
+     "prompt_number": 12
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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-- 
cgit