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{
"metadata": {
"name": "",
"signature": "sha256:52168f8cf69a70c4ff180e7d64c2bf193739db268ee5cdc6db9f3696c7774225"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter4-Basic Terms of Physics and Engineering"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg61"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#find the area piston for given parameters\n",
"#given\n",
"a=3.\n",
"#diameter squared\n",
"#calculation\n",
"A=0.785*3**2\n",
"print\"%s %.2f %s\"%(\"area of piston \",A,\"\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"area of piston 7.07 \n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex2-pg62"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"#find the area of piston and displacement of that piston\n",
"a=3.\n",
"b=4.\n",
"A=0.785*3**2\n",
"print\"%s %.2f %s\"%(\"area of piston \",A,\"\")\n",
"D=A*b\n",
"#by using above results\n",
"print\"%s %.2f %s\"%(\"displacement of piston \",D,\"cu in\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"area of piston 7.07 \n",
"displacement of piston 28.26 cu in\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex3-pg63"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"#find the piston speed\n",
"pa=9.\n",
"S=1600.\n",
"#average piston velocity =distance traveld/time to travel\n",
"#first divide by 1 min and u will get same result late divide by 12 because to express per minute\n",
"Ps=(pa*S)/(12.)\n",
"print\"%s %.2f %s\"%(\"piston speed \",Ps,\"ft per min\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"piston speed 1200.00 ft per min\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex4-pg65"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"#compute the average acceleration `\n",
"#pressure= force/area\n",
"#first express the velocity in ft per sec.time\n",
"t=5.\n",
"v=9000.\n",
"Min=(9000./60.)\n",
"Aa=(Min/t)\n",
"print\"%s %.2f %s\"%(\"average acceleration\",Aa,\"ft per sec^2\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"average acceleration 30.00 ft per sec^2\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex5-pg65"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#compute the pressure force\n",
"#given\n",
"w=12000.\n",
"p=6.\n",
"a=10**2\n",
"f=p*a\n",
"P=w/f\n",
"print\"%s %.2f %s\"%(\"pressure \",P,\"Psi\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"pressure 20.00 Psi\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex6-pg66"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"#compute the gas force action on pistion \n",
"#use the figure to compute it \n",
"p=500.\n",
"D=5**2\n",
"#force=pressure*area\n",
"area=0.785*D\n",
"F=p*area\n",
"print\"%s %.2f %s\"%(\"force \",F,\"lb\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"force 9812.50 lb\n"
]
}
],
"prompt_number": 6
}
],
"metadata": {}
}
]
}
|
