Two spheres, labeled a and b, have identical masses, but are made of different substances. the specific heat capacity of sphere a is 645 j/(kg.°c ) and that of sphere b is 240 j/(kg.°c). the spheres are initially at 21 °c; and the same quantity of heat is added to each sphere. if the final temperature of sphere a is 74 °c, what is the approximate final temperature of sphere b?
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