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I've found the question that I am doing at this site:

http://www.kent.k12.wa.us/pcpow/questions/phys/0105Bird/index.html [Broken]

The answer is given here, but not the steps:

http://www.kent.k12.wa.us/pcpow/solutions/physics/0105bird/index.html [Broken]

I know how to do Part A, but no matter how I tried to do part B (What was the thermal equilibrium temperature of that coffee), I do not get the answer given 56.97 degrees C.

I've followed the instructions in the solution and setted the energy lost by the coffee to be equal to the energy gained by the ice and the cream:

I've attached my work:

http://img139.imageshack.us/img139/231/worklb2.th.png [Broken]

Can someone tell me what I did wrong?

http://www.kent.k12.wa.us/pcpow/questions/phys/0105Bird/index.html [Broken]

The answer is given here, but not the steps:

http://www.kent.k12.wa.us/pcpow/solutions/physics/0105bird/index.html [Broken]

I know how to do Part A, but no matter how I tried to do part B (What was the thermal equilibrium temperature of that coffee), I do not get the answer given 56.97 degrees C.

I've followed the instructions in the solution and setted the energy lost by the coffee to be equal to the energy gained by the ice and the cream:

I've attached my work:

http://img139.imageshack.us/img139/231/worklb2.th.png [Broken]

Can someone tell me what I did wrong?

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