Marc Attaches a Falling 328-Kg Object with a Rope Through

question 75

Multiple Choice

Marc attaches a falling 328-kg object with a rope through a pulley to a paddle wheel shaft.He places the system in a well-insulated tank holding 23.2 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 88.6 m at constant speed,what is the temperature change of the water? (1 kcal = 4 186 J,the specific heat of water is 4 186 J/kg⋅°C,and g = 9.80 m/s²)

• A)17 000 C°
• B)2 930 C°
• C)2.93 C°
• D)0.587 C°
• E)5.87 C°

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Definitions:

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Hidden Observer

A theoretical part of the mind proposed by Ernest Hilgard to explain hypnotic phenomena, suggesting a part of the mind remains aware and observant during hypnosis.

Ernest Hilgard

An influential psychologist known for his research on hypnosis, particularly the theory that a "hidden observer" part of the brain is aware of what happens to the person during hypnosis.