Using Newton's second law and numerical modeling, a second-order differential equation describes the fluid's motion by accounting for changing mass and damping forces. The experiment is designed for students to collect real-time data via video analysis, track fluid movement, and analyze the results using Python. The relationship between fluid resistance and the oscillation parameters, such as the submersion depth and damping coefficient, is explored. This experiment offers an engaging approach to understanding oscillatory systems and fluid behavior in various physical contexts.

The phenomenon occurs when a straw is submerged in water and then lifted. As water is held inside the straw by the balance between atmospheric pressure and the vacuum created at the top of the straw, the liquid remains within, as shown in Figure 1(a). In the experiment, when we cover the top of the straw with a finger, submerge it in liquid, and suddenly release the finger (as shown in Figure 1(b)), an interesting event takes place. The hydrostatic pressure forces the liquid from below to rush into the straw, causing the liquid level to rapidly rise above the surface of the bath. The fluid then undergoes several oscillations before settling at the same level as the surrounding water, as illustrated in Figure 1(c), which shows how the liquid level changes over time.

By connecting a simple Newtonian model to these experimental observations, we can analyze the behavior of the system using Python. This model allows us to solve the governing ordinary differential equations numerically. Through this process, students can explore key concepts in fluid dynamics and oscillatory motion. This experiment serves as both a practical demonstration of these principles and a foundation for learning about fluid behavior and damped oscillations through computational methods.