Answer
$61^{\circ}C$
Work Step by Step
Each of them have the same specific heat, so we can simply average the temperatures using the masses in grams:
$T = \frac{(90)(168)+(3)(84)}{168+84}=61^{\circ}C$
Essential University Physics: Volume 1 (3rd Edition)
by Wolfson, Richard
Published by
Pearson
ISBN 10:
0321993721
ISBN 13:
978-0-32199-372-4
Chapter 16 - Exercises and Problems - Page 300: 56
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