Exercise 1.1.23

Question

The graph shows the power consumption for a day in September in San Francisco. (P is measured in megawatts; t is measured in hours starting at midnight.)
    
    \begin{enumerate}[label=(\alph*)]
        \item What was the power consumption at 6 am? At 6 pm?
        \item When was the power consumption the lowest? When was it the highest? Do these times seem reasonable?
    \end{enumerate}

Khagan Gulusoy · Accepted Answer

\begin{enumerate}[label=(\alph*)]
    \item Power consumption at 6 am is approximately equal to 500 MW. At 6 pm, it's approximately 720 MW.
    \item The power consumption was the lowest at 4 am; it was the highest at approximately 11:50 am. %These times are reasonable, because power consumption depends on times of the day.
    These times are reasonable.
    \begin{itemize}
        \item Between 6 AM and 9 PM, most people wake up and go to school/university/work which is why power consumption steadily increases between these hours.
        \item Between 10 AM and 5 PM, power consumption reaches its peak since most people and production sites usually are active around this time.
        \item Between 6 PM and 8 PM, increasingly more people leave for home and go to sleep which results in a steady decrease in power consumption. The graph also reflects the fact that people are usually asleep between 10 PM and 6 AM.
    \end{itemize}
\end{enumerate}

Exercise 1.1.23

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Exercise 1.1.23

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