Q4 is part A of the question, and Q5 is part B of the question. Mystery Number Q
ID: 777820 • Letter: Q
Question
Q4 is part A of the question, and Q5 is part B of the question.
Mystery Number Q4: Thermal Resistance: You decide to build at tiny house in the woods and "live with nature" (including knee deep poison ivy and noisy leaf stomping squirrels). You will heat it in winter with electric heat. The cost of electricity is S0.12/(kW*Hr). The average temperature of an Indiana winter in Jan is (-5C) and you keep your living room toasty warm (20C) all the time. A human generates 100 Watt just sitting around doing nothing (your plan). You live inside as a hermit and never open the dooi Draw the thermal circuit for vour house. Determine the Resistance values for each part. ow much will it cost to heat your dream house for the month of Jan? Your house is constructed as follows 1. 2. 3. The Roof is 4.00m wide x 4.00m long x 0.15m deep and is made of silica aerogel (a foamed glassy material with very high insulating ability) The floor has no significant heat loss and can be ignored. The two back walls are 4.00m wide x 2.50m tall and consist of layers a. 0.5" of interior gypsum wallboard, b. 4 of fiberglass insulation c. 1 of wood outer wall. 4. One front wall consists of a Wood wall 6" thick with a double pane glass door 0.80m wide x 2.00m tall. 5. The other front wall consists of a Wood wall 6" thick with a double pane glass window 4.00m wide x 2.50m tall. 6. Both the the glass door and the glass windows are constructed as follows a 1/8" (=0.0032m) of window glass b. lcm ( 0.0100m) of air gap c. 1/8" ( 0.0032m) of window glass Thermal Conductivity Watti(meter Kelvin 0.15 Material Wood concrete 0.96 0.025 0.17 0.04 205 0.13 16 1000 0.02 Air between glass panes all fiberglass insulation Aluminum Plywood Stainle Diamond Silica Aerogel Vacuum ss steelExplanation / Answer
Answer 5)
Woods burns release = 19 M J/kg
Energy released by burning 1 cord = 667 calories = 2790.728 J
Total numbers of cord required = 19x10^6/(2790.728 x 3625)=1.8781 cords
= Approximately 2 cords
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