U-factor measures how well a product prevents heat from escaping a home or building (thermal conductivity). U-factor ratings generally fall between 0.15 and 1.20. (See more at: http://www.nfrc.org/windowratings/Energy- ratings.html#sthash.EUkrrint dpuf) A lower U-factor means a better-insulating window. The more common term R-value refers to the resistance of the window to heat conduction, and it is the inverse of the U- factor (that is, R-value = 1/U-factor). Better windows have high R-values and low U-factors. Determine all surface type of areas in Table 8-1 from the house in figure 1 and calculate R-values with the given U-factor Table 8 -1 Surface Type Size of area U-factor R-values (width x height = ff') a) Walls 0.06 b) Ceiling (**Assume the ceiling area is the same as rectangular floor area, A=L x W) 0.025 c) Total window x 8 ea (argon-filled, double glazed for all windows) 0.35 d) Total door (insulated steel entry doors) x 2ea 0.20

U-factor measures how well a product prevents heat from escaping a home or building (thermal conductivity). U-factor ratings generally fall between 0.15 and 1.20. (See more at: http://www.nfrc.org/windowratings/Energy- ratings.html#sthash.EUkrrint dpuf) A lower U-factor means a better-insulating window. The more common term R-value refers to the resistance of the window to heat conduction, and it is the inverse of the U- factor (that is, R-value = 1/U-factor). Better windows have high R-values and low U-factors. Determine all surface type of areas in Table 8-1 from the house in figure 1 and calculate R-values with the given U-factor Table 8 -1 Surface Type Size of area U-factor R-values (width x height = ff') a) Walls 0.06 b) Ceiling (**Assume the ceiling area is the same as rectangular floor area, A=L x W) 0.025 c) Total window x 8 ea (argon-filled, double glazed for all windows) 0.35 d) Total door (insulated steel entry doors) x 2ea 0.20

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter1: Introduction To Statics

Section: Chapter Questions

Problem 1.12P: A differential equation encountered in the vibration of beams is d4ydx4=2D where x = distance...

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