CAPE Physics Unit 1 · 2016 · Paper 1 · Question Q37

A contractor builds an office window of height 150\text{ cm} and width 200\text{ cm} with a glass pane of thickness 0.5\text{ cm}. The temperature difference across the glass is 15\text{ K} and the thermal conductivity of the glass is 0.65\text{ W m}^{-1}\text{ K}^{-1}. What is the heat energy per second conducted through the window?

1. (A)1.63\text{ kW}
2. (B)5.85\text{ kW}
3. (C)163\text{ W}
4. (D)585\text{ W}