A Sphere of Surface Area 1

question 95

Multiple Choice

A sphere of surface area 1.25 m² and emissivity 1.0 is at a temperature of 100°C.At what rate does it radiate heat into empty space? (σ = 5.67 × 10^-8 W/m² ∙ K⁴)

• A)7.1 W
• B)0.71 mW
• C)1.4 kW
• D)9.9 mW
• E)3.7 W

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Definitions:

Sequencer Program

A series of instructions designed to execute a set of operations in a specific order, often used in automation and control systems to manage complex processes.

Transition

In system design and programming, a transition refers to the change of state or condition, often triggered by specific events or conditions.

Sequencer Instruction

A command in PLC programming that manages a sequence of operations or steps in a controlled process.

Energized

A state wherein a component or circuit has electrical power supplied to it, making it operational or active.