Some Properties of a Certain Glass Are Listed Here

question 79

Multiple Choice

Some properties of a certain glass are listed here:
Density 2300 kg/m³
Specific heat capacity 840 J/kg ∙ °C
Coefficient of thermal expansion 8.5 × 10^-6 (°C) ^-1
Thermal conductivity 0.80 W/m ∙ °C
A glass window pane is 2.7 m high,2.4 m wide,and 9.0 mm thick.The temperature at the inner surface of the glass is
And at the outer surface 4°C.How much heat is lost each hour through the window?

• A)3.1 × 10^{7 J}
• B)3.1 × 10^{4 J}
• C)8.6 × 10^{3 J}
• D)8.6 J
• E)3.1 × 10^{5 J}

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Definitions:

Strategic

Pertaining to the identification of long-term goals and the creation of plans to achieve these goals, often in the context of business or military operations.

Primary Goals

The main objectives or targets that an individual or group aims to achieve.

David McClelland

A psychologist known for his work on motivation, specifically the Theory of Needs concerning achievement, power, and affiliation.

Autonomy

The capacity to make an informed, uncoerced decision; often related to the concept of independence and self-direction.