일반물리학 1 — Temperature, Heat, and the First Law of Thermodynamics: Problem 3

A common window is to be replaced with a better insulated one. The initial window has glass with thickness 4.0 mm. The new window has two such glass layers, separated by 1.2 cm, with the intermediate space containing air. For (a) the common window and (b) the replacement, find the energy loss in watts per square meter when the outside temperature is \(-20^\circ\text{F}\) and the inside temperature is \(+72^\circ\text{F}\).