Question

"What is the frequency of your microwave?

A. 2.45 GHz; 4.92×10⁻²⁰ kJ4.92×10⁻²⁰kJ; 12.2 mm12.2mm
B. 2.45 GHz; 1.63×10⁻²⁰ kJ1.63×10⁻²⁰kJ; 18.4 mm18.4mm
C. 5.8 GHz; 3.84×10⁻²⁰ kJ3.84×10⁻²⁰kJ; 12.2 mm12.2mm
D. 5.8 GHz; 6.41×10⁻²⁰ kJ6.41×10⁻²⁰kJ; 18.4 mm18.4mm"

Answer 1

The typical frequency of a microwave oven is 2.45 GHz, which is specifically absorbed by water molecules in food to heat it. Option A states this frequency but needs more context to confirm the energy and wavelength values.

Step-by-step explanation:

The frequency of a typical microwave oven is 2.45 GHz. Microwaves at this frequency are produced by accelerating electrons, which induce an alternating electric field within the oven. This frequency is absorbed by water molecules in food, raising their rotational energies and thus heating the food. Among the given options, Option A (2.45 GHz; 4.92×10⁻²⁰ kJ; 12.2 mm) matches the standard frequency used in microwave ovens. However, the energy and wavelength values provided do not seem to correspond to this frequency based on the relevant formula that connects frequency, energy, and wavelength, and therefore additional context or information is needed to confirm the correctness of these values.