The two-dimensional object shown in Figure P2.16 is insulated with the exception of two flat portions that are exposed to two different temperatures. The temperature gradient at surface 1 is measured and found to be $\partial T / \partial x=45 \mathrm{~K} / \mathrm{m}$. What are $\partial T / \partial x$ and $\partial T / \partial y$ at surface 2 ?

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1 m T = 150 C y FIGURE P2.16 k =15 W/mK 2 m T2=-10 C