Marc Attaches a Falling 250-Kg Object with a Rope Through

question 17

Multiple Choice

Marc attaches a falling 250-kg object with a rope through a pulley to a paddle wheel shaft.He places the system in a well-insulated tank holding 12 kg of water.When the object falls,it causes the paddle wheel to rotate and churn the water.If the object falls a vertical distance of 100 m at constant speed,what is the temperature change of the water? (1 kcal = 4186 J,the specific heat of water is 4186 J/kg · °C,and g = 9.8 m/s²)

• A) 19,600°C
• B) 4700°C
• C) 4.9°C
• D) 2.3°C

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A comprehensive term for the state of being comfortable, healthy, or happy, often used in the context of mental, physical, and social health.

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Refers to the different categories of interventions or conditions applied to subjects in experimental research.

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The variable in an experiment or study that is manipulated by the researcher to observe its effect on the dependent variable.