An electric kitchen range has a total wall area of 1.40 m2 and is insulted with a layer of fiber glass that has a temperature of 175 oC and its outside surface is 35 oC. The fiber glass has a thermal conductivity of 0.040 Wm-1K-1. Calculate the rate of flow of heat through the insulation, assuming the fibre as a flat slab of area of 1.40 m2.​

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )