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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": {}
}
]
}
|
