Conduction of heat is expressed as:

$\overline{){\mathbf{Q}}{\mathbf{=}}\frac{\mathbf{k}\mathbf{A}\mathbf{\u2206}\mathbf{T}\mathbf{t}}{\mathbf{L}}}$, where ΔT = T_{hot} - T_{cold}

Increasing the temperature of the warmer object will increase the value of ΔT and hence higher heat transfer.

Option a. is incorrect.

If the area of their contact is increased, the rate of heat transfer will increase.

Therefore, option b. is incorrect.

Which of these actions would decrease heat transfer between two objects?

a. increasing the temperature of the warmer object

b. increasing the area of their contact

c. reducing the thermal energy of the cooler object

d. reducing the time of their contact

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