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What physical property expresses how hot or cold water is?
A. Weakness
B. Weighing
C. Walker
D. Water temperature
The correct answer is: D. Water temperature
The correct answer is water temperature, as it specifically refers to the measurement of how hot or cold water is. Temperature is a fundamental physical property that quantifies the thermal energy of a substance, indicating the average kinetic energy of its molecules. In practical and clinical settings like that of a CNA, understanding water temperature is essential for tasks such as bathing a patient or preparing warm compresses, as it ensures safety and comfort. The other options do not pertain to the measurement of hot or cold. Weakness refers to a physical or emotional state, weighing pertains to the measure of mass, and walker is unrelated, as it refers to a mobility aid. Therefore, water temperature is the only choice that accurately describes the property in question.