Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
5th Edition
ISBN: 9781305084766
Author: Saeed Moaveni
Publisher: Cengage Learning
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Chapter 11, Problem 11P
To determine
Find the heat loss through the wall.
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A 30 m steel tape is 2 mm long at 20 degrees Celsius with a pull of 55 N. A rectangle is measured with this The sides are recorded at 144.95 m and 113.00 m. The average temperature during the measurement is 30 degrees Celsius with a pull of 55 N. Use coefficient of expansion of steel tape as a 0.0000116 per degree Celsius.
Compute the actual length of tape during measurement
What is the true area?
What is the error in sq.m?
A double-pane glass window consists of two pieces of glass, each having athickness of 8 mm, with a thermal conductivity of k = 1.4 W⁄m ⋅ K . The twoglass panes are separated by an air gap of 10 mm, as shown in Figure 11.10 .Assuming the thermal conductivity of air to be k = 0.025 W⁄m ⋅ K , determinethe total R-value for this window. The total thermal resistance of the window is obtained by adding the resistance offered by each pane of glass and the air gap in the following manner:
Chapter 11 Solutions
Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
Ch. 11.2 - Prob. 1BYGCh. 11.2 - Prob. 2BYGCh. 11.2 - Prob. 3BYGCh. 11.2 - Prob. 4BYGCh. 11.2 - Prob. 5BYGCh. 11.2 - Prob. BYGVCh. 11.4 - Prob. 1BYGCh. 11.4 - Prob. 2BYGCh. 11.4 - Prob. 3BYGCh. 11.4 - Prob. 4BYG
Ch. 11.4 - Prob. BYGVCh. 11.6 - Prob. 1BYGCh. 11.6 - Prob. 2BYGCh. 11.6 - Prob. 3BYGCh. 11.6 - Prob. 4BYGCh. 11.6 - Prob. BYGVCh. 11 - Prob. 1PCh. 11 - Prob. 2PCh. 11 - Alcohol thermometers can measure temperatures in...Ch. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - Calculate the R-value for the following materials:...Ch. 11 - Calculate the thermal resistance due to convection...Ch. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - Estimate the change in the length of a power...Ch. 11 - Calculate the change in 5 m long copper wire when...Ch. 11 - Prob. 16PCh. 11 - Prob. 17PCh. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Prob. 23PCh. 11 - Prob. 24PCh. 11 - Prob. 26PCh. 11 - Prob. 27PCh. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - Prob. 30PCh. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - Prob. 33PCh. 11 - Prob. 34PCh. 11 - Prob. 35PCh. 11 - For Problems 11.11, 11.12, and 11.13, calculate...Ch. 11 - Prob. 37PCh. 11 - Prob. 38PCh. 11 - Prob. 39PCh. 11 - Prob. 40PCh. 11 - Prob. 41PCh. 11 - Prob. 42PCh. 11 - Prob. 43PCh. 11 - Prob. 44PCh. 11 - Prob. 45PCh. 11 - Prob. 46PCh. 11 - Prob. 47PCh. 11 - Prob. 48PCh. 11 - Prob. 49P
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- Calculate the R-value for the following materials: a. 4 in. thick brick b. 10 cm thick brick c. 12 in. thick concrete slab d. 20 cm thick concrete slab e. 1 cm thick human fat layerarrow_forwardPlease do it handwrittenarrow_forward3. A 30 m steel tape is 2 mm too long at 20°C with a pull of 55 N. A rectangle is measured with this The sides are recorded as 144.95 m and 113.00 m. The average temperature during the measurement is 30°C with a pull of 55 N. Use coefficient of expansion of steel tape as a 0.0000116 m /°C. tape. a) Compute the actual length of tape during measurement. b) What is the true area? c) What is the error in area in sq.m.arrow_forward
- A 1,065 ft², 7 in. thick concrete wall has inside and outside surface temperatures of 25°C and 9°C. A 2 in. insulation batt with a thermal conductivity of k = 0.03 Btu/(h· ft· °F) is added to the wall. Determine the reduction in heat transfer rate. What is the thickness of the insulation in meters? m What is the thermal conductivity value of the insulation batt in W/(m .K)? W/(mK) What is the R-value of the concrete wall (in m². K/W)? m². K/W What is the R-value of the insulation batt (in m². K/W)? m². K/W What is the heat transfer rate (in W) when the insulation is added? W What is the percent reduction in the heat transfer rate? %arrow_forwardDraw a graph showing the emulsification breaker effect over time points (W X Y Z) .arrow_forwardA 30 meter tape is 2mm too long at 20℃ with a pull of 55N. A rectangle is measured with this tape. The ideas are recorded as 144.95 meter and 113.00 meter. The average temperature during the measurement is 30℃ with a pull of 55N. Use coefficient of expansion of steel tape as a 0.0000116/℃. Compute the actual length of tape during measurement. What is the true area. What is the error in area in sq.meter.arrow_forward
- The heat loss, in Btu/hr, for two different types of walls is given. Find in Btu/hrthe difference in the heat losses.arrow_forward3. 6.0" wide wooden fence posts are embedded in a concrete driveway a distance 12.125" apart. There is a 1/16" gap between the post and the concrete (see diagram). The posts are installed when the temperature is 12°C. Determine if the gap will close when the temperature increases to 32°C and if not how big the gap will be at that temperature. The thermal expansion coefficients of wood and concrete are awood =32 x 105 °C and aconcrete =13 x 106 °C. 1 inch3D2.54 cm. 6.0" 12.0" 0.0625"arrow_forwardWhat is the pressure inside the raindrop that is 0.06 in diameter when the temperature is 70⁰ F? The answer was already given, please show the solution. ANSWER: 0.0276 psigarrow_forward
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