Place the third piece in the middle that will divide the two stock cabinets. Connect with as many screws as necessary. Afterwards, add a bottom piece (on top of base) and a back to the island. Feel free to get creative with the material.
In this case, we say that their corresponding shared energy eigenvalue is degenerate. It is therefore often convenient to have a the concept of the energy levels. The degeneracy $g_n$ of the energy level $E_n$ is defined as the number of distinct energy eigenvalues $\epsilon_m$ for which $\epsilon_m=E_n$.For simplicity, we assume that none of the levels is infinitely degenerate so that $g_n\geq 1$ is integer for all $n$.owever, noting that whenever there is degeneracy, sum of the terms in the sum will be the same, we can rewrite the partition function as a sum over levels \begin{align} Z = \sum_{n} g_n e^{-\beta E_n} \end{align} The degeneracy factor is precisely what counts the number of terms in the sum that have the same energy.
Closely related to energy consumption is the concept of total primary energy supply (TPES), which - on a global level - is the sum of energy production minus storage changes. Since changes of energy storage over the year are minor, TPES values can be used as an estimator for energy consumption.