Heat conduction through window · PhysicsBowl 2019 #13
Physics · thermodynamics
Problem
You measure that 4000 kcal of heat conducts through a window in your house in one hour when the house is kept at 20°C. The window is a 4.0 m² pane of 0.30 cm thick glass (k = 2.0 × 10⁻⁴ kcal/s∙m∙C°). What is the outside temperature?
(A) 4°C (B) 8°C (C) 13°C (D) 16°C (E) 18°C