Passage III
In an experiment to study the effect of circulation on ice formation in water, 2 identical insulated containers without lids (Tank X and Tank Y) were each fitted with 2 thermometers as shown in Figure 1. A pump was mounted on the base of Tank X. Each tank was filled with 20 L of 14°C water. Both filled tanks were then placed in a temperature-controlled freezer set to -12°C, and the pump was switched on, circulating the water in Tank X. The temperature from each thermometer was recorded every hour for 30 hours (see Figures 2 and 3).
12. Over the 30 hr of the experiment, the temperature of the water at the bottom of Tank X:
Your Answer is
Correct Answer is J
Explanation
Observing figure 2, I am happy to find that whether it is bottom or top, the temperature drops first and then stays the same