Final answer:
The potential problem to study is the effect of temperature on antacid efficacy. The dependent variable is the time it takes for the antacid tablet to relieve stomach pain.
Step-by-step explanation:
The potential problem to study in this case is the effect of temperature on antacid efficacy. By observing the faster relief of stomach pain when the antacid tablet is taken with warm water compared to room temperature water, we can investigate how temperature affects the effectiveness of the antacid.
The dependent variable in this investigation would be the time it takes for the antacid tablet to relieve stomach pain. The independent variable would be the temperature of the water used to dissolve the tablet. To ensure accurate results, the controlled variables would include the same brand and dosage of antacid tablet, the same amount of water, and the same conditions for each trial.