Awindow consists of two 4mm thick glass (k = 0.26 w/mk), separated by 12 mm stagnant air layer (k = 0.26 w/mk) and encased in a 2.5 cm thick steel frame (k = 43 w/mk). if the frame cross-sectional area is 5% of the total area, then for any given temperature difference, the percentage of the total heat flow rate that passes through the frame is

answer: 500 wph.

explanation:

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer: 5

explanation:

6-1