A Circular Window in the Wall of a Home Has

question 79

Multiple Choice

A circular window in the wall of a home has a diameter of 25 cm and is made of a single pane of glass 0.30 cm thick. The thermal conductivity for the glass is 0.63 W/(m·K) . If 1.6 kJ of heat is lost through the window in 12 s, and if inside the house the temperature is 20 °C, what is the outside temperature?

• A) −12 °C
• B) 18 °C
• C) 7.1 °C
• D) 17 °C
• E) −17 °C

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Definitions:

Selector Switch

A switch that allows the user to select between multiple options or circuits, typically by rotating a knob or moving a lever.

Numbering Wires

The practice of assigning unique numbers or labels to wires within a system or piece of equipment to facilitate identification and tracking.

Ladder Diagram

A schematic representation used in programming PLCs (Programmable Logic Controllers) that resembles the rungs of a ladder, where each rung represents a logic operation.