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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 7: Superconductivity"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.3_1: calculate_critical_temperature_of_element.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Chapter-7,Example7_3_1,pg 7-6\n",
+"\n",
+"Ho=2*10^5                                   //critical field at absolute zero\n",
+"\n",
+"Hc=1*10^5                                   //critical field at given temperature\n",
+"\n",
+"T=8                                         //temperature\n",
+"\n",
+"Tc=T/sqrt(1-(Hc/Ho))\n",
+"\n",
+"printf('\ncritical temperature of the element Tc = %.2f Kelvin' ,Tc)\n",
+""
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.3_2: find_the_critical_field.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Chapter-7,Example7_3_2,pg 7-7\n",
+"\n",
+"Bo=3.06*10^-2                                //critical field at absolute zero\n",
+"\n",
+"Tc=3.7                                       //critical temperature\n",
+"\n",
+"T=2                                          //temperature\n",
+"\n",
+"Bc=Bo*(1-(T/Tc)^2)\n",
+"\n",
+"printf('\ncritical field of wire  Bc = %.5f T',Bc)\n",
+""
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.3_3: calculate_the_critical_current.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Chapter-7,Example7_3_3,pg 7-7\n",
+"\n",
+"Ho=6.5*10^4                                   //critical field at absolute zero\n",
+"\n",
+"Tc=7.18                                       //critical temperature\n",
+"\n",
+"T=4.2                                         //temperature\n",
+"\n",
+"r=0.5*10^-3                                   //radius of lead wire\n",
+"\n",
+"Hc=Ho*(1-(T/Tc)^2)\n",
+"\n",
+"Ic=2*%pi*r*Hc\n",
+"\n",
+"printf('\ncritical current for wire  Ic = %.2f Amperes\n',Ic)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.3_4: calculate_the_isotopic_mass.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Chapter-7,Example7_3_4,pg 7-8\n",
+"\n",
+"Tc1=4.185                            //critical temperature 1\n",
+"\n",
+"Tc2=4.133                            //critical temperature 2\n",
+"\n",
+"M1=199.5                             //isotopic mass of a metal at temperature T1\n",
+"\n",
+"a=0.5\n",
+"\n",
+"M2=(Tc1*sqrt(M1)/Tc2)^2\n",
+"\n",
+"printf('\nisotopic mass is M2 = %.2f',M2)\n",
+""
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}