Answer:
Objects that are of the same size but made of different materials
Explanation:
The rate it takes the object to cool is equivalent to the rate of heat loss
The rate of heat loss is given by the equation:
dQ/dt = K(T-T₀)
Where T = Temperature of the hot surface
T₀ = Temperature of the surrounding
K = constant
Both K and the rate of heat loss depends on the:
Since the student only wants to know how the material in which the object is made of affects change in temperature, it means only the materials must be varied while other factors such as area and the size of the objects are kept constant.