An identical metal flask contains the same volume of hot water at the same starting temperature (90 ∘C90\ ^\circ\text{C}90 ∘C).
This flask has a polished, shiny silver outer surface, whereas the first flask had a matte black outer surface.
The cooling experiment is repeated with this polished flask, and a new curve is plotted on the same axes.
State how the new cooling curve would differ from the original curve shown in Figure 1.
