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April 19, 2014

April 19, 2014

Posted by **Josh** on Tuesday, January 17, 2012 at 8:37pm.

heat of 200 J/kg

◦

C, and initial temperature

of 100

◦

C is dropped into an insulated jar that

contains liquid with a mass of 3.9 kg, speciﬁc

heat of 1000 J/kg

◦

C, and initial temperature

of 0

◦

C. The piece of metal is removed after

7 s, at which time its temperature is 20

◦

C.

Find the temperature of the liquid after the

metal is removed. Neglect any eﬀects of heat

transfer to the air or to the insulated jar.

Answer in units of

◦

C

- physics -
**bobpursley**, Tuesday, January 17, 2012 at 8:41pmthe sum of the heats gained is zero.

massmetal*cmetal(20-100)+massliquid*cliquid(Tf-0)=0

solve for Tf

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