The rates of fall temperature of two identical solid spheres of different materials are equal at...

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The rates of fall temperature of two identical solid spheres of different materials are equal at a certain temperature if:
(A) Their specific heat capacities are equal
(B) Their heat capacities are equal
(C) Their specific heat capacities are proportional to their densities
(D) Their specific heat capacities are inversely proportional to their densities
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