A 19-M² Thermopane Window Is Constructed by Using Two Layers of of Glass

question 58

Multiple Choice

A 1.9-m² Thermopane window is constructed by using two layers of glass 4.0 mm thick,separated by an air space of 5.0 mm.If the temperature difference is 25.0 °C from the inside of the house to the outside air,what is the rate of heat flow through this window? (Thermal conductivity for glass is 0.840 J/s⋅m⋅°C and for air 0.023 4 J/s⋅m⋅°C. )

• A)2 530 W
• B)426 W
• C)3 190 W
• D)210 W
• E)2 100

---

Definitions:

Plantwide Factory Overhead Rate

A single overhead absorption rate calculated by dividing total factory overheads by total machine hours or labor hours, applied uniformly across all products and services.

Machine Hours

A measure of the amount of time a machine is operated, used in costing and operational efficiency analysis.

Single Plantwide Factory Overhead Rate

A method of allocating manufacturing overhead costs uniformly across all units produced within a single factory.

Direct Labor Hours

The total hours worked by employees who are directly involved in the production of goods or services.