Hi, can you help me with the following problem? A thermally insulated tank of water 2 m x 2 m, depth 1 m is stirred with a paddle for threehours. If the paddle is driven by a motor whose shaft power is 8 kW determine the rate ofchange of temperature in degrees C per hr and the increase in temperature of the water.The specific heat of water is 4200 J/kgC. Identify a system and start your analysis from anappropriate form of the Fist Law of Thermodynamics

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter3: Transient Heat Conduction
Section: Chapter Questions
Problem 3.37P
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Hi, can you help me with the following problem?

A thermally insulated tank of water 2 m x 2 m, depth 1 m is stirred with a paddle for three
hours. If the paddle is driven by a motor whose shaft power is 8 kW determine the rate of
change of temperature in degrees C per hr and the increase in temperature of the water.
The specific heat of water is 4200 J/kgC. Identify a system and start your analysis from an
appropriate form of the Fist Law of Thermodynamics 

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