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Physics, 29.06.2019 06:10 kaileelmiller71

Let's estimate the heat loss of a simple house in winter. the house is cubic, 40 ft long by 25 ft wide by 20 ft tall. it loses heat in all directions except downward (although we could include this), so we account for the area of the 5 sides. the average outer heat transfer coefficient 15 w/m2-k, the average inner h- 10 w/m2-k. the walls are 6" thick with fiberglass insulation. we'll ignore windows and doors for this problem. we maintain the inner temperature of the house at 68 f-20 c, and the average january temperature in pennsylvania is close to 32 f 0c. inote: just for your information .. the cost/month of a 1 kw loss 1 kw ($0.10/kw-h) (720 h/30 days)- $72/ month! lowering your thermostat by 1 c changes this by 1/20-596-$3.60] what is the average rate of heat loss in this home in january? a)- 7.8 kw b)- 16 kw c)-140 kw d)-0.038 e)-0.52

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Let's estimate the heat loss of a simple house in winter. the house is cubic, 40 ft long by 25 ft wi...
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