punching-a-chicken.ipynb

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   "source": [
    "# Punch-frying a chicken\n",
    "\n",
    "For no good reason, a friend asked: how many times would you have to punch a chicken to deep-fry it?\n",
    "    \n",
    "Let's assume a 6 lb chicken, 2 kg of cooking oil, starting at room temp, and that we only need to raise the chicken and oil to 325 F for cooking (neglecting heat to hold it there)\n",
    "\n",
    "Google up some quick stats for chicken heat capacity, oil heat capacity, and energy in a punch.  They're in inconsisten units so we'll use Python's `pint` library to do unit conversions automatically."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import pint"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "u = pint.UnitRegistry()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [],
   "source": [
    "chick_heat_cap = .74 * u.BTU / (u.lb * u.degR) * 6 * u.lb"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "\\[4.4399999999999995\\ british\\_thermal\\_unit/degree\\_Rankine\\]"
      ],
      "text/latex": [
       "$4.4399999999999995\\ \\frac{\\mathrm{british\\_thermal\\_unit}}{\\mathrm{degree\\_Rankine}}$"
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      "text/plain": [
       "4.4399999999999995 <Unit('british_thermal_unit / degree_Rankine')>"
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     },
     "execution_count": 34,
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   ],
   "source": [
    "chick_heat_cap"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [],
   "source": [
    "oil_heat_cap = 1.67 * u.kJ / (u.kg * u.K) * 2 * u.kg"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "\\[3.34\\ kilojoule/kelvin\\]"
      ],
      "text/latex": [
       "$3.34\\ \\frac{\\mathrm{kilojoule}}{\\mathrm{kelvin}}$"
      ],
      "text/plain": [
       "3.34 <Unit('kilojoule / kelvin')>"
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     "execution_count": 35,
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   ],
   "source": [
    "oil_heat_cap"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "\\[11.772007552\\ kilojoule/kelvin\\]"
      ],
      "text/latex": [
       "$11.772007552\\ \\frac{\\mathrm{kilojoule}}{\\mathrm{kelvin}}$"
      ],
      "text/plain": [
       "11.772007552 <Unit('kilojoule / kelvin')>"
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     "execution_count": 36,
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   ],
   "source": [
    "oil_heat_cap + chick_heat_cap"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [],
   "source": [
    "delta_T = -(300 * u.degK - Q_(325, u.degF))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "\\[1600.1428265265781\\ kilojoule\\]"
      ],
      "text/latex": [
       "$1600.1428265265781\\ \\mathrm{kilojoule}$"
      ],
      "text/plain": [
       "1600.1428265265781 <Unit('kilojoule')>"
      ]
     },
     "execution_count": 43,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "delta_E = delta_T * (oil_heat_cap + chick_heat_cap)\n",
    "delta_E"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "\\[16001.42826526578\\ dimensionless\\]"
      ],
      "text/latex": [
       "$16001.42826526578\\ dimensionless$"
      ],
      "text/plain": [
       "16001.42826526578 <Unit('dimensionless')>"
      ]
     },
     "execution_count": 45,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "delta_E / (0.1 * u.kJ)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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