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Objects A and B have the equal mass of 3.4 kilogram and are at their melting points. They melt when 4.2 × 104 J of heat is added to A and when 9.3 × 104 J is added to B.
(a) Find the latent heat of fusion for the substance from which each object is made.
(b) Estimate the heat required to melt object A when its mass is 6.8 kg.
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