A rectangular lot was measured using a 50-m steel tape at 30 oC. If the recorded length and width of the lot are 197.56m and 105.63m respectively. Determine the Error in the area, if the coefficient of thermal expansion is 0.0000116/ oC and standard temperature of the tape is 25 oC.
A rectangular lot was measured using a 50-m steel tape at 30 oC. If the recorded length and width of the lot are 197.56m and 105.63m respectively. Determine the Error in the area, if the coefficient of thermal expansion is 0.0000116/ oC and standard temperature of the tape is 25 oC.
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Calculate the amount of heat that is needed to keep the inside temperature at 20 0C
when it is at 3
0C outside in a flat in the middle of the development which has an outside
window area of 6m2 within a total external wall and window area of 28m2
with a U value of
1.2 watts/m2 Co and compare to a flat on the top floor at one end where the window area is
doubled and the external wall area is three times as big. The U value of the walls is
0.23watts/m2 Co
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