A Microwave Oven Operates with Sinusoidal Microwaves at a Frequency

question 9

Multiple Choice

A microwave oven operates with sinusoidal microwaves at a frequency of 2400 MHz. The height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm. Assume that microwave energy is generated uniformly on the upper surface of the cavity and propagates directly downward toward the base. The base is lined with a material that completely absorbs microwave energy. The total microwave energy content of the cavity is 0.50 µJ. What is the power output of the oven? (c = 3.00 × 10⁸ m/s, μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A) 0.50 kW
• B) 0.55 kW
• C) 0.60 kW
• D) 0.65 kW
• E) 0.70 kW

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Definitions:

With All Deliberate Speed

A phrase used in the 1954 Supreme Court decision Brown v. Board of Education, mandating the desegregation of public schools, but allowing it to proceed at a gradual pace.

Desegregate

To abolish racial segregation, particularly in public institutions like schools and facilities.

Private Discrimination

Discriminatory practices by individuals or private organizations, as opposed to practices enforced or mandated by the government.

Sexual Orientation

A person's emotional, romantic, or sexual attraction to individuals of a specific gender.