EBK ENGINEERING FUNDAMENTALS: AN INTROD
5th Edition
ISBN: 9780100543409
Author: MOAVENI
Publisher: YUZU
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Chapter 11, Problem 29P
To determine
Calculate the heat loss through the side walls of a refrigerator.
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Determine the thermal resistance R′ and the R-value for the glass window ofThe thermal resistance R′ and the R-value of the window can be determined from as shown , respectively.
A steel tape with a coefficient of thermal expansion of 0.0000116/°C is known to be 50 m long at 20°C. The tape was used to measure a line that is 642.90 m long when the temperature was 35ºC.
a) Calculate the temperature correction per tape length.
b) Calculate the correction for the measured line.
c) Calculate the correct length of the measured line.
Chapter 11 Solutions
EBK ENGINEERING FUNDAMENTALS: AN INTROD
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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- 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:arrow_forwardA steel tube with 5 cm ID, 7.6 cm OD and k=15W/m °C is covered with an insulative covering of thickness 2 cm and k 0.2 W/m °C. A hot gas at 330° C with h = 400 W/m2oC flows inside the tube. The outer surface of the insulation is exposed to cooler air at 30°C with h = 60 W/m2oC. Calculate the heat loss from the tube to the air for 10 m of the tube and the temperature drops resulting from the thermal resistances of the hot gas flow, the steel tube, the insulation layer and the outside air.arrow_forwardAnswer quickly please thanksarrow_forward
- A well-mixed, insulated water storage tank is to be maintained at internal temperature 60°C. The environmental temperature around the tank varies from -25°C to 30°C. The tank's exterior surfaces (total = 125 m²) have four different levels of insulation as indicated in the table. Surface Component Area, Effective RSI, 2 m² 2 m². °C/W Surface A 60.0 Surface B 30.0 Surface C 30.0 Surface D 5.0 Say that just one surface can be selected to have its insulation upgraded such that its effective RSI would be doubled. Which should be selected to achieve the greatest reduction in heat loss? 10.0 15.0 4.0 0.5arrow_forwardproblems in newton’s law of coolingarrow_forwardThe heat loss, in Btu/hr, for two different types of walls is given. Find in Btu/hrthe difference in the heat losses.arrow_forward
- Derive the relation for adiabatic compressibility for ideal gas.arrow_forwardQ. 1/ piece of copper, whose length is 10 cm and the area of its section is 6 cm2. Fix one end of it on 150c and make the other end tangent to a piece of iron of 8cm length and equal to it with the cross-sectional area and straight to one, and the temperature of the piece of iron was 20c. Calculate the contact point temperature between the two pieces, noting that the thermal conductivity coefficient of copper is Scmc / [0.85, while for iron it is 0.75] / ScmC.arrow_forwardPLEASE PROVIDE A COMPLETE SOLUTION WITH FIGURE FOR ME TO FOLLOW :) ANSWER IS GIVEN FOR REFERENCE. THANK YOU!arrow_forward
- Chapter 6 7.arrow_forwardA line was measured to be 412 m using a 30-m tape, which is of standard length at a temperature of 20 deg.C. During measurement, the temperature was 52 deg.C. If the coefficient of thermal expansion of the tape material is 0.0000116 m/m deg.C, calculate the correct length of the line.arrow_forward6- A liquid has a specific weight of 59 lb/ft and a dynamic viscosity of 2.75 lb . s/ft'. Determine its kinematic viscosity.arrow_forward
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