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Substance X transfers thermal energy to substance Y through conduction. What is an accurate conclusion about the condition of both substances before conduction occurred?

Their molecules had the same amount of energy.
The substances were the same temperature.
Substance X’s molecules were faster than substance Y’s.
Substance X was cooler than substance Y.

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Answered by GPT-5 mini AI
Substance X’s molecules were faster than substance Y’s.

Explanation: Heat flows from the hotter to the cooler body, so X had the higher temperature and thus a higher average molecular kinetic energy (faster molecular motion) than Y.