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iPad 3:38 PM 88% edugen.wileyplus.com Welcome, Skyler-Blackboard Learn WileyPLUS I Log out WileyPLUS cutnell, Physics, 10e GENERAL PHYSICS Home Read, Study & Practice Gradebok ORION Chapter 12, Problem 051 Interactive Solution 12.51 deals with one approach to solving problems such as this. A 0.214-kg coffee mug is made from a material that has a specific heat capacity of 965 /kg Co and contains 0420 kg of water. The cup and water are at 29.8 C. To make a cup of coffee, a small electric heater is immersed in the water and brings it to a boil in two minutes. Assume that the cup and water aways have the same temperature and determine the minimum power rating of this heater 002 012 03o Chaoter 12 Problem Number the tolerance is +/-2% 034 Click if you would like to Show Work for this question: gemShayeck Question Attempts: O of 5 used SAVE FOR LATER 073 Review Score Objective Copyright 2000-2015 by John Wiley & Sons, Inc. or related companies nghts reserved. version 4.162.2Explanation / Answer
mass of the mug, mM=0.214 kg
specific heat capacity, CM=965 J/kg.C
mass of the water mw=0.42 kg
specific heat capacity, Cw=4186 J/kg.C
initial Temeperature T1=29.8 oC
final Temeperature T2=100 oC
Heat supplied, Q=mM*CM*(T2-T1)+mw*Cw*(T2-T1)
Q=0.214*965*(100-29.8)+0.42*4186*(100-29.8)
Q=137917.03 J
and
time t=2min
power P=Q/t
p=137917.03/(2*60)
P=1149.3 W
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