### Required InformationSometimes equations can be developed and practical problems solved by knowing nothing more than the dimensions of the key parameters. For example, consider the heat loss through a window in a building. Window efficiency is rated in terms of R value, which has the unit of ft²·hr·°F/Btu. A certain manufacturer offers a double-pane window with \( R = 2.5 \) and also a triple-pane window with \( R = 3.4 \). Both windows are 3.5 ft by 5 ft. On a given winter day, the temperature difference between the inside and outside is 45°F.#### Question:How much heat is lost through the double-pane window?**\[ \text{Btu} \]**---### Explanation:To calculate the heat loss through a double-pane window, we need to use the formula for heat transfer through a surface with a known R value:\[ Q = \frac{\Delta T \cdot A}{R} \]Where:- \( Q \) = Heat loss in Btu- \( \Delta T \) = Temperature difference in °F- \( A \) = Area of the window in ft²- \( R \) = R value of the window in ft²·hr·°F/BtuGiven data for the double-pane window:- \( \Delta T = 45°F \)- \( R = 2.5 \) ft²·hr·°F/Btu- \( \text{Area} = 3.5 \text{ ft} \times 5 \text{ ft} = 17.5 \text{ ft}² \)Using the formula:\[ Q = \frac{45 \text{ °F} \times 17.5 \text{ ft}²}{2.5 \text{ ft}²·hr·°F/Btu} \]Step-by-step calculation:1. Multiply the temperature difference by the area:\[ 45 \text{ °F} \times 17.5 \text{ ft}² = 787.5 \text{ ft}²·°F \]2. Divide by the R value:\[ Q = \frac{787.5}{2.5} = 315 \text{ Btu/hr} \]Thus, the heat loss through the double-pane window is 315 Btu/hr.

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! Required information Sometimes equations can be developed and practical problems solved by knowing nothing more than the dimensions of the key parameters. For example, consider the heat loss through a window in a building. Window efficiency is rated in terms of R value, which has the unit of ft2-hr-°F/Btu. A certain manufacturer offers a double-pane window with R=2.5 and also a triple-pane window with R= 3.4. Both windows are 3.5 ft by 5 ft. On a given winter day, the temperature difference between the inside and outside is 45°F. How much heat is lost through the double-pane window? Btu

! Required information Sometimes equations can be developed and practical problems solved by knowing nothing more than the dimensions of the key parameters. For example, consider the heat loss through a window in a building. Window efficiency is rated in terms of R value, which has the unit of ft2-hr-°F/Btu. A certain manufacturer offers a double-pane window with R=2.5 and also a triple-pane window with R= 3.4. Both windows are 3.5 ft by 5 ft. On a given winter day, the temperature difference between the inside and outside is 45°F. How much heat is lost through the double-pane window? Btu

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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