A Microwave Oven Operates with Sinusoidal Microwaves at a Frequency

question 21

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:

Diathesis-stress Model

The diathesis-stress model is a psychological theory that explains behavior as a predispositional vulnerability together with stress from life experiences.

Demonological Model

An outdated concept attributing mental illness to possession by evil spirits or demons, predominant in pre-modern societies.

Dissociative Identity Disorder

A severe form of dissociation characterized by the presence of two or more distinct personality states or identities within an individual.

Depersonalization-derealization Disorder

A psychiatric disorder characterized by persistent or recurrent feelings of detachment from one's self or the environment.