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p-Index From 2020 - 2025
0.444
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All Journal International Journal of STEM Education for Sustainability
Fahra, Raden Manzilah Mubarokah
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Education

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Understanding the Effect of Fruits Maturity Level on Its Effectiveness as a Dielectric for Parallel Plate Capacitors for Senior High School Student Rosanti, Yerika Puspa; Fahra, Raden Manzilah Mubarokah; Khotimah, Siti Nurul
International Journal of STEM Education for Sustainability Vol 5, No 1 (2025)
Publisher : Gemilang Maju Publikasi Ilmiah (GMPI) 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53889/ijses.v5i1.444

Abstract

Indonesia is an agrarian country that produces fruits in abundant quantities and in various variations. Fruits contain diverse contents, one of which can be utilized as a dielectric capacitor. This research is conducted to provide senior high school students with an understanding of the influence of dielectrics from several fruits on capacitance. This experiment analyzed the maturity level of fruits and their effectiveness as dielectric capacitors for parallel plate capacitors. Due to the maturity level of fruits being composed of many variables, this study is focused on differences in water content, sugar concentration, and acidity level. Through laboratory experiments, researchers examined these factors in guava, papaya, pear, mango, and apple fruits. The capacitance value of parallel plates is measured using an LCR meter, and it is found that the capacitance of parallel plates with air dielectric increases significantly when infiltrated with fruit dielectric. Water content has a significant influence. The capacitance value is also high in fruits with high water content and vice versa. Meanwhile, the influence of sugar concentration is less significant in this study, only noticeable in papaya fruits. However, this is supported by the fruit's acidity level as seen from its pH value. Fruits with high pH values also have high capacitance. Experiments found that as fruits ripen, their water content, sugar concentration, and pH value tend to increase. This causes mature fruits to be more effective when used as dielectric capacitors.
Understanding the Terminal Velocity of Particle Motion in Fluids at the Senior High School Level with Numerical Experiments Hun, Hilarius Donatus; Fahra, Raden Manzilah Mubarokah; Putri, Bella Yunisah; Aufia, Yasrifa Fitri; Jubaedah, Jubaedah
International Journal of STEM Education for Sustainability Vol 4, No 2 (2024)
Publisher : Gemilang Maju Publikasi Ilmiah (GMPI) 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53889/ijses.v4i2.389

Abstract

Investigating the motion of solid particles in fluids analyzes the drag force experienced by the particles, depending on parameters such as particle diameter, fluid velocity, density, and viscosity. The Reynolds number, which expresses a fluid's inertia relative to its viscosity, governs the dimensionless drag coefficient, which is critical to understanding drag forces. Terminal velocity, achieved when the force of gravity equals the buoyancy and drag forces of the fluid, is a critical concept often analyzed using the Stokes model. However, differences between theoretical and experimental terminal velocities arise due to oversight of the model's application conditions. Numerical experiments offer controlled conditions to address this, helping predictions align with theoretical models. This research explores the influence of density ratio and particulate diameter on terminal velocity, aiming to support research-based learning for teachers and conceptual understanding for students. Numerical experiments designed by Arbie et al. (2021) investigated two-dimensional particulate configurations, allowing controlled manipulation of parameters. The results show a strong influence of the density ratio and diameter to the terminal velocity, with larger parameter values influencing the Reynolds number and giving rise to differences between theoretical and experimental values. Therefore, careful parameter selection is essential for viscosity experiments, aligning with the objectives and comparability of theoretical models.
Co-Authors Aufia, Yasrifa Fitri Hun, Hilarius Donatus JUBAEDAH JUBAEDAH, JUBAEDAH Putri, Bella Yunisah Rosanti, Yerika Puspa Siti Nurul Khotimah