A window has dimensions of 1.6 m by 2.85 m and is made of glass 7.25 mm thick. On a winter day, the outside temperature is 24° C while the inside temperature is a comfortable at 19.5° C. (k of glass =0.195W/m.K) (1.5+1.5+2 = 5marks) Calculate the following: a) the area of the window in square metres Answer for part 1 . b) the temperature gradient (ΔT/Δx)in kelvin/metre Answer for part 2 . c) the rate of heat lost through the window by conduction in watts Answer for part 3

Principles of Physics: A Calculus-Based Text
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Chapter1: Introduction And Vectors
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Problem 6P: Figure P1.6 shows a frustum of a cone. Match each of the three expressions (a) (r1 + r2)[h2 + (r2 ...
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A window has dimensions of 1.6 m by 2.85 m and is made of glass 7.25 mm thick. On a winter day, the outside temperature is 24° C while the inside temperature is a comfortable at 19.5° C. (k of glass =0.195W/m.K)    (1.5+1.5+2 = 5marks)

Calculate the following:

a) the area of the window in square metres 

Answer for part 1

.
b) the temperature gradient (ΔT/Δx)in kelvin/metre  

Answer for part 2

.
c) the rate of heat lost through the window by conduction in watts 

Answer for part 3

.  

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