Final answer:
The melting point of a substance is a physical property that is specific to its chemical composition and structure, so without additional information about object A's material or melting point, we cannot determine when it will melt.
Step-by-step explanation:
The question relates to the melting points of two objects, A and B, both with the same mass of 3.6 kg. We are only given the melting point for object B, which is 3.8×104 degrees. Without additional information, such as the specific melting points for objects A and B, the materials they are made of, or the energy required to melt them, it is impossible to determine when object A will melt. The melting point of a substance is a physical property that is determined by its chemical composition and structure, not by its mass.