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# Answer: A 0.400 kg sample is placed in a cooling apparatus

ISBN: 9780470469088 189

## Solution for problem 30 Chapter 18

Fundamentals of Physics Extended | 9th Edition

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Problem 30

A 0.400 kg sample is placed in a cooling apparatus that removes energy as heat at a constant rate. Figure lS-32 gives the temperature T of the sample versus time t; the horizontal scale is set by ts = SO.O min. The sample freezes during the energy removal. The PROBLEMS 501 specific heat of the sample in its initial liquid phase is 3000 J/kg . K. What are (a) the sample's heat of fusion and (b) its specific heat in the frozen phase?

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• KeyPoints o UnitofforceandmagnitudeismeasuredinNewtons o Direction=+or- o ObjectofInterest:theobjectbeinganalyzed o Makesuretoaskyourself,“Isitfalling” o NetForce:thesumofforces o Equilibrium:netforce=0 o System:objectofinterestandobjectexertingforcesonit...

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