I ran an experiment in Lab. Placed a can of Tuna in a hot bath and a thermometer inside the can and one outside to measure temperatures inside the can and outside of it, respectively. In addition, also had a thermometer about 8in away from the Tuna can to measure the hot water bath temperature. I measured the temperature in intervals of minutes for 90 minutes. The temperatures went from 0 - 97 degrees after the 1 1/2 hr. The temps varied, in most instances, it raised, but at a few instances, it seemed to decrease some degrees. The question I was asked was, is the system a Transient Heat Transfer or Steady State? How can I tell?