The inner and outer surface temperature of a glass window 10 mm thick are 25 and 5 degree-C, respectively. What is the heat loss through a 1 m x 3 m window

The  heat loss is  

Explanation:

From the question we are told that

   The thickness is  

    The inner temperature is  

    The outer temperature is

    The length of the window is  L  = 1 m  

    The  width of the window is  w  =  3 m  

Generally the heat loss is mathematically represented as

Where  k is the thermal conductivity of glass with value

   and A  is the area of the window with value

substituting values

d) physical means can be used to separate the components of air.