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July 31, 2015

Homework Help: Physics Please someone help please

Posted by Akbar on Thursday, April 26, 2012 at 6:37pm.

A 34 g glass thermometer reads 21.6C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7C. What was the original temperature of the water?

-.135(4186)(Tf-38.7)=.034(840)(Tf-21.6)
=-565.11Tf+21869.752=28.56Tf-616.896
solve for Tf
Tf= 37.88 degree celcius but its wrong please help!

thank you

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