Final answer:
The temperature of the liquid at noon cannot be determined without the initial temperature before noon. If the temperature decreased by -2°C each hour and an initial temperature was given, subtract 2°C for each hour until noon to find the noon temperature.
Step-by-step explanation:
To solve this problem, we need to understand the concept of temperature changes over time, which is a fundamental aspect of thermodynamics, a branch of physics. The question states that the temperature of the liquid is expected to change by -2°C each hour. This means that every hour, the temperature will decrease by 2°C from its previous value.
We are not given the initial temperature of the liquid at a specific time before noon, therefore, without this information, we cannot provide the exact temperature at noon. However, we can say that if the temperature at 11 am was, for instance, 20°C, by noon it would be 20°C - 2°C, which equals 18°C. If we were given the initial temperature at a certain time, we could calculate the temperature at noon by subtracting 2°C for each elapsed hour up until noon.