which of these actions would increase heat transfer between two objects?\no establishing their thermal…

Answer:

B. increasing the area of their contact

Explanation:

Step1: Understand heat - transfer factors

Heat transfer is related to factors like temperature difference, contact area, time, and thermal properties.

Step2: Analyze each option

• Establishing thermal equilibrium: When two objects are in thermal equilibrium, there is no net heat transfer, so this does not increase heat transfer.
• Increasing the area of their contact: According to the heat - transfer formula $Q = kA\frac{\Delta T}{d}$ (for conduction, where $Q$ is heat transfer, $k$ is thermal conductivity, $A$ is contact area, $\Delta T$ is temperature difference, and $d$ is thickness), increasing $A$ increases $Q$.
• Using objects with similar specific heats: Specific heat is related to the amount of heat an object can store per unit mass and temperature change, not directly to the rate of heat transfer between two objects.
• Reducing the time of their contact: Reducing contact time decreases the amount of heat transferred according to the basic concept of heat - transfer over time.