{ "metadata": { "name": "", "signature": "sha256:3fb09c0fd0a89152f5948cdf5eed31775a718eb29c5fc9edfb34ed6af2984184" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Chapter 02:Systems of Units of Measurement" ] }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex2.1:pg-29" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# To convert area in metre to feet\n", "# Modern Electronic Instrumentation And Measurement Techniques\n", "# By Albert D. Helfrick, William D. Cooper\n", "# First Edition Second Impression, 2009\n", "# Dorling Kindersly Pvt. Ltd. India\n", "# Example 2-1 in Page 29\n", "\n", "\n", "\n", "# Given data\n", "A_m = 5000 # area in metre**2 unit\n", "\n", "#Calculation\n", "A_ft = A_m * (1/0.3048)**2 # As 1ft = 0.3048m\n", "print \"The area in feet = \",round(A_ft),\" sq.ft\"\n", "\n", "#Result\n", "# The area in feet = 53820 sq.ft \n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "The area in feet = 53820.0 sq.ft\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex2.2:pg-29" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# To convert flux density to different units\n", "# Modern Electronic Instrumentation And Measurement Techniques\n", "# By Albert D. Helfrick, William D. Cooper\n", "# First Edition Second Impression, 2009\n", "# Dorling Kindersly Pvt. Ltd. India\n", "# Example 2-2 in Page 29\n", "\n", "\n", "\n", "# Given data\n", "B_cm = 20 # flux density in maxwell/sq.cm\n", "\n", "#Calculations\n", "\n", "B_in = B_cm *2.54**2 # converting to lines/sq.inch\n", "print \"The flux density in lines/sq.in =\",round(B_in),\" lines/(in**2)\"\n", "\n", "#Result\n", "# The flux density in lines/sq.in = 129 lines/(in**2) \n", "\n", "\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "The flux density in lines/sq.in = 129.0 lines/(in**2)\n" ] } ], "prompt_number": 3 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex2.3:pg-29" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# To convert velocity to a different unit\n", "# Modern Electronic Instrumentation And Measurement Techniques\n", "# By Albert D. Helfrick, William D. Cooper\n", "# First Edition Second Impression, 2009\n", "# Dorling Kindersly Pvt. Ltd. India\n", "# Example 2-3 in Page 29\n", "\n", "\n", "\n", "# Given data\n", "c_s = 2.997925 * 10**8 # velocity in m/s\n", "\n", "#Calculations\n", "c_hr = 2.997925 *10**8* 1/10**3* 3.6*10**3 # velocity in km/hr\n", "print \"The velocity of light in km/hr = \",\"{:.3E}\".format(c_hr),\" km/hr\"\n", "\n", "#Result \n", "# The velocity of light in km/hr = 1.079e+009 km/hr " ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "The velocity of light in km/hr = 1.079E+09 km/hr\n" ] } ], "prompt_number": 10 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex2.4:pg-29" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# To convert density to a different unit\n", "# Modern Electronic Instrumentation And Measurement Techniques\n", "# By Albert D. Helfrick, William D. Cooper\n", "# First Edition Second Impression, 2009\n", "# Dorling Kindersly Pvt. Ltd. India\n", "# Example 2-4 in Page 29\n", "\n", "\n", "\n", "# Given data\n", "Density_ft = 62.5\n", "\n", "#Calcualtions\n", "Density_in = 62.5 * (1/12.0)**3\n", "Density_cm = Density_in * 453.6 * (1/2.54)**3\n", "print \"(a) The density of water in lb/cubic inch = \",round(Density_in,6),\" lb/(in**3).\\n\"\n", "print \"(b) The density of water in g/cubic cm = \",round(Density_cm,6), \"g/(cm**3).\"\n", "\n", "#Result\n", "# (a) The density of water in lb/cubic inch = 0.036169 lb/(in**3).\n", "# (b) The density of water in g/cubic cm = 1.001171 g/(cm**3). \n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "(a) The density of water in lb/cubic inch = 0.036169 lb/(in**3).\n", "\n", "(b) The density of water in g/cubic cm = 1.001171 g/(cm**3).\n" ] } ], "prompt_number": 12 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex2.5:pg-30" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# To convert speed limit to a different unit\n", "# Modern Electronic Instrumentation And Measurement Techniques\n", "# By Albert D. Helfrick, William D. Cooper\n", "# First Edition Second Impression, 2009\n", "# Dorling Kindersly Pvt. Ltd. India\n", "# Example 2-5 in Page 30\n", "\n", "\n", "\n", "# Given data\n", "speed_km = 60 # speed limit in km/hr\n", "\n", "#Calculations\n", "speed_m = 60 *10**3 *10**2 *(1/2.54) *(1/12.0)*(1.0/5280)\n", "speed_ft = 37.3 *5280 *(1/(3.6*10**3))\n", "\n", "print \"(a) The speed limit in m/hr = \",round(speed_m,1),\" mi/hr\\n\"\n", "print \"(b) The speed limit in ft/s = \",round(speed_ft,1),\" ft/s\"\n", "\n", "#Result\n", "# (a) The speed limit in m/hr = 37.3 mi/hr\n", "# (b) The speed limit in ft/s = 54.7 ft/s \n", "\n", "\n", "#The answer given in textbook is printed incorrectly and does not match with calculated answer\n", "\n", "\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "(a) The speed limit in m/hr = 37.3 mi/hr\n", "\n", "(b) The speed limit in ft/s = 54.7 ft/s\n" ] } ], "prompt_number": 16 } ], "metadata": {} } ] }