A student was investigating cooling times for two pots made of different materials. One-pot was stainless steel and the other pot was
iron. The pots were placed on a table in a 25°C room. The pots and water
were originally at 100°C. The student recorded the temperature of the
water in each pot over time. The graph below shows the results. a.
Determine the amount of time it took the water in the iron pot to cool
from 100°C to 60°C. b. Based on the graph, which pot, the iron pot or the
stainless steel pot, was a better conductor of thermal energy? Explain
your answer. c. Identify two methods of heat transfer that occurred as
the water in the pots cooled, and describe how the transfer of heat
occurred for each method. d. Describe when the pots no longer
experienced a net loss of thermal energy.

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