appendix

food_energy.tex

@@ -93,6 +93,30 @@ If Tenoch was 100k people, how much land area?
 The work was prompted in part by discussions with John Deming, Carl Ferkinhoff, and Sarah Taber.
 %\end{acknowledgments}
 
+%The command \appendix is used to signify the start of the appendices. Thereafter
+%\section, \subsection, etc, will give headings appropriate for an appendix. To obtain
+%a simple heading of ‘Appendix’ use the code \section*{Appendix}. If it contains
+%numbered equations, figures or tables the command \appendix should precede it and
+%\setcounter{section}{1} must follow it
+\appendix
+\section{Introductory Food Energy Questions}
+
+Planning to save money, one college student decides to go to an all-you-can-eat buffet each day at 11am.  If he brings homework and stretches the meal out for a few hours he can get all $3000~kcals$ with only one meal bill.  Food is fuel for the human body. If his body burned all this food at once, how much warmer would he get? 
+Useful information: the student has a mass of 80kg and is made mostly of water.  A Calorie heats 1 kg of water $1^{\circ}C$. 
+
+Answer
+\bea
+3000kcals &=& 80kg\cdot1 \frac{kcal}{kg\cdot C^{\circ}}\cdot\Delta T\\
+\Delta T &\approx& +37.5^{\circ}
+\eea
+Fat tissue serves a valuable purpose, brown fat, babies, songbirds
+
+What power does the body give off in the more realistic case that the 3000kcal is burned over 24 hours? 
+Useful information: $1 kcal \approx 4200J$ and $1 J/s=1W$.
+\be
+\frac{3000kcal}{24hours}\frac{4200J}{1kcal}\frac{1hour}{3600sec}\approx145W
+\ee
+Survival swimming, putting all the kids in one bed on a cold winter night.
 
 
 \section*{References}