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← ScienceWithin a microwave oven which process elevates the temperature of water molecules in food?
A)Resonant absorption of electromagnetic energy✓
B)Conduction within the metallic cavity walls
C)Nuclear magnetic resonance of hydrogen atoms
D)Catalytic decomposition of water molecules
💡 Explanation
When microwaves interact with food, water molecules absorb energy through resonant absorption because the microwave frequency matches the rotational frequency of water, causing increased molecular motion and heat. Therefore resonant absorption elevates temperature, rather than conduction, NMR, or catalytic decomposition, which operate via distinct mechanisms.
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