Question

which of these actions would increase heat transfer between two objects? establishing their thermal equilibrium increasing the area of their contact using objects with similar specific heats reducing the time of their contact

Explanation:

• Thermal equilibrium means no net heat transfer, so "establishing their thermal equilibrium" is incorrect.
• Heat transfer (conduction, for contact) is related to contact area. Increasing contact area provides more surface for heat to transfer, so this increases heat transfer.
• Specific heat relates to heat capacity, not directly to the rate of heat transfer between two objects in contact, so "using objects with similar specific heats" doesn't increase heat transfer.
• Reducing contact time would decrease the time available for heat to transfer, so it reduces heat transfer.

Answer:

B. increasing the area of their contact (assuming the options are labeled as A: establishing their thermal equilibrium, B: increasing the area of their contact, C: using objects with similar specific heats, D: reducing the time of their contact)