The Cylindrical Filament in a Light Bulb Has a Diameter

question 49

Multiple Choice

The cylindrical filament in a light bulb has a diameter of 0.050 mm,an emissivity of 1.0,and a temperature of 3000°C.How long should the filament be in order to radiate 60 W of power? (σ = 5.67 × 10^-8 W/m² ∙ K⁴)

• A)11 cm
• B)9.4 cm
• C)8.6 cm
• D)7.2 cm
• E)5.9 cm

---

Definitions:

Systematic Procedures

Involves a methodical approach to tasks or operations that follow a specific, organized sequence of steps or protocols.

Mesosystem

A concept in Bronfenbrenner's ecological systems theory referring to the interconnections between different microsystems in an individual's life.

Bronfenbrenner's Bioecological

A theory that emphasizes the importance of understanding how the environment and biological systems mutually affect each other and development over time.

Accommodation

The cognitive process of revising existing cognitive schemas, perceptions, and understanding to incorporate new information.