A Microwave Oven Operates with Sinusoidal Microwaves at a Frequency

question 42

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, ,

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

---

Definitions:

Protostomes

A group of animals within the animal kingdom that develop the mouth before the anus during embryonic development, as part of the blastopore’s fate.

Spiral Cleavage

A type of early embryonic development found in some invertebrates, where cells divide at oblique angles to each other.

Deuterostomes

Deuterostomes are a major group of animals characterized by their embryonic development; in deuterostomes, the anus forms before the mouth during early embryogenesis.

Protostomes

A group in the animal kingdom distinguished by their embryonic development; during gastrulation, the first opening (the blastopore) becomes the mouth.