Two electronic devices are embedded in a substrate. These devices dissipate powe

Question

Two electronic devices are embedded in a substrate. These devices dissipate power P1 and P2 respectively. The substrate is mounted onto a heat sink that maintains the bottom surface at the sink temperature Ts. The other surfaces are perfectly insulated.

The substrate is instrumented with a thermocouple as shown. Some independent tests of the steady-state temperature of the thermocouple are reported below: We now run another experiment with the following conditions, Ts = 15 degree C. P1 = 1 W, P2 = 2 W. What steady-state reading, Ttc, do you expect from the thermocouple under these conditions. Assume that the system can be modeled as linear?

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