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All Journal WAPFI (Wahana Pendidikan Fisika) Jurnal Teknologi Informasi dan Ilmu Komputer Jurnal Edukasi dan Penelitian Informatika (JEPIN) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Journal of Teaching and Learning Physics JETT (Jurnal Elektro dan Telekomunikasi Terapan) Turbo : Jurnal Program Studi Teknik Mesin JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Momentum: Physics Education Journal TEKTRIKA - Jurnal Penelitian dan Pengembangan Telekomunikasi, Kendali, Komputer, Elektrik, dan Elektronika Jurnal Pengabdian Kepada Masyarakat MEMBANGUN NEGERI Charity : Jurnal Pengabdian Masyarakat Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram eProceedings of Engineering Jurnal Rekayasa elektrika Telkatika: Jurnal Telekomunikasi Elektro Komputasi & Informatika
Nurwulan Fitriyanti
Telkom University
Arts Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Social Sciences Other

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Aplikasi Gas Hidrogen Hasil Elektrolisis Pada Motor Bakar (Genset) Basundari, Ananda Putri Indira; Suwandi; Fitriyanti, Nurwulan
eProceedings of Engineering Vol. 12 No. 5 (2025): Oktober 2025
Publisher : eProceedings of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstrak — Penggunaan bahan bakar fosil pada sektorenergi menghadapi tantangan serius akibat keterbatasancadangan dan dampak lingkungan, sehingga pemanfaatanhidrogen sebagai bahan bakar tambahan menjadi alternatifyang menjanjikan. Penelitian ini bertujuan mengevaluasipengaruh penambahan gas HHO hasil elektrolisis air terhadapkinerja genset berbahan bakar bensin dan solar. Pengujiandilakukan dalam empat tahap, yaitu produksi gas HHO,pengujian tanpa beban, pengujian dengan beban lampu 1000W, serta penerapan sistem siklus tertutup di mana reaktorelektrolisis memperoleh suplai daya langsung dari genset.Parameter yang dianalisis meliputi durasi operasi, specific fuelconsumption (SFC), dan efisiensi sistem. Hasil penelitianmenunjukkan bahwa penambahan gas HHO mampumemperpanjang waktu operasi genset, menurunkan nilai SFC,dan meningkatkan efisiensi. Sistem siklus tertutup terbuktiefektif karena meskipun sebagian daya digunakan untukreaktor, pembakaran yang lebih sempurna tetap menghasilkanenergi bersih lebih besar dibandingkan tanpa HHO. Di antaratiga jenis bahan bakar, solar memberikan performa terbaik,sedangkan pada mesin bensin, pertalite menunjukkan hasillebih unggul dibandingkan pertamax sesuai rasio kompresimesin yang digunakan. Temuan ini menegaskan potensi gasHHO sebagai bahan bakar tambahan yang efisien, mandiri, danberkelanjutan untuk pembangkit listrik skala kecil.Kata kunci— Bensin, Efisiensi Sistem Genset, Gas HHO,Genset, Siklus Tertutup, Solar
Misconceptions on the understanding of flying objects in fluids Wibowo, Edy; Ulya, Naily; Helvantriyudo, Whibatsu; Azyumardi, Muhammad Maliki; Hafiduddin, Fata; Rokhmat, Mamat; Handayani, Ismudiati Puri; Abrar, Abrar; Fitriyanti, Nurwulan; Sutisna, Sutisna; Ameruddin, Amira Saryati
Momentum: Physics Education Journal Vol. 7 No. 2 (2023)
Publisher : Universitas PGRI Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/mpej.v7i2.6881

Abstract

The concepts of floating, flying, and sinking object have been studied since junior high school. However, we still often find students' misconceptions regarding the concept, especially of flying objects, even at the university level. This work aims to propose a clarification of the concept of a flying object in the fluid to be correctly described the condition for the flying object. We used eggs, water, and salt solutions to demonstrate sinking, rising, and floating objects in the fluids. The results showed that when the density of the object is the same as the density of the fluid, the position of the object is still at the bottom of the fluid since it was not flying in the middle of the depth of the fluid. But the object does not touch the bottom of the container so that the object's height is zero. This is because the object has not had a driving force (Fd = 0) that pushes the object upward towards the surface of the fluid to float. When the density of the fluid slightly exceeds the density of the object, the object immediately moves upward to the fluid surface - floating phenomenon is started. The greater the difference between the density of the fluid and the density of the object, the faster the object moves towards the surface. The object cannot stay at any position between the bottom and the surface of the fluid. A stable position is reached when the object reaches the surface of the fluid to float. This work is expected to increase students' understanding of flying objects in fluids.
Derivation of Newton's law of cooling and heating: Heating the water then cooling it down naturally to the room temperature Wibowo, Edy; Ulya, Naily; Farizi, Mohammad Rakha; Fitriyanti, Nurwulan
Momentum: Physics Education Journal Vol. 7 No. 1 (2023)
Publisher : Universitas PGRI Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/mpej.v7i1.6889

Abstract

A simple experiment has been conducted to study Newton's law of cooling and heating by observing the nature of the increasing and decreasing water temperature by utilizing a data logger, a thermocouple, a pan, a hot plate, and water. The uncovered pan contained water which was subsequently heated on a hot plate. The water was heated at ambient temperature and normal atmospheric pressure to see that the temperature rose exponentially. Conversely, the temperature of hot water decreased exponentially when the heat source was switched off. The model for increasing and decreasing water temperature is following the Newton's law of cooling and heating. It was proven that the experimental data highly fit theoretical models. The temperature increment constant (ka) and the temperature decrement constant (kd) determined the rate of temperature changes. Low values of ka and kd led to the slow change in the temperature, either the increase or the decrease in the water temperature and vice versa. The ka > kd was observed for all given conditions so that the increasing rate in the water temperature was faster than its decrease. The result of this study can be applied as an example of contextual learning of physics for university students.
Open-Circuit Voltage Characteristics of Cu–Zn Soil Batteries in Humus, Peat, and Sand: Experimental Comparison and Empirical Regression suwandi, suwandi; Utami, Amaliyah Rohsari Indah; Fitriyanti, Nurwulan; Davianti, Ajeng Faradilla Putri; Ghassani, Deika Saffanah Nisyyah; Arfandi, Rizky Nurfadillah
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 14 No 2 (2025): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v14i2.28494

Abstract

The development of low-cost, sustainable power sources is critical to supporting distributed environmental sensing, agricultural monitoring, and physics education in regions with limited or unreliable access to the grid. This study investigates the open-circuit voltage (OCV) characteristics of Cu–Zn soil batteries embedded in three representative Indonesian soils, humus, peat, and sand, using a 26-cell series–parallel stack under controlled laboratory conditions, along with an empirical logarithmic regression model for electrode sizing. A total of 26 Cu–Zn cells were installed in each soil type, with three independent containers per soil (n = 3) at 25 ± 1 °C; stack OCV was recorded every 5 minutes over 30 minutes, and baseline soil physicochemical properties (moisture, pH, organic C, total N, C/N ratio, and exchangeable Ca, K, and Fe) were characterized to aid interpretation. The results show that humus produced the highest and most stable average stack voltage (9.92 V; range 9.55–10.08 V), followed by peat (8.70 V; 8.50–8.90 V) and sand (6.17 V; 5.99–6.27 V), a ranking consistent with differences in organic matter, acidity, and exchangeable cations rather than directly measured soil electrical conductivity. An empirical logarithmic model linking electrode surface area to OCV, adapted from previous studies and recalibrated for the present configuration, yielded average relative errors of approximately 4–5% within the tested electrode-area range, indicating good agreement between predicted and measured voltages while remaining well below theoretical electrochemical potentials. Within the limitations of short-term, open-circuit measurements without current–voltage or aging tests, these findings identify humus as the most favorable medium among the tested soils for achieving relatively high and stable OCV, and provide an empirically validated framework to support the design and upscaling of Cu–Zn soil battery arrays for sustainable low-power applications in agriculture and physics education.
Co-Authors Abrar Abrar Abrar Ismardi Ahmad , Ali Hanafi Ahmad, Ali Hanafi Akbar, Iqbal Nur Alfariji, Rafli Noveri Amaliyah Rohsari Indah Utami Ameruddin, Amira Saryati Arfandi, Rizky Nurfadillah Arfianto Arfianto Asep Suhendi Auliana Darmaningsih Awaludin Salam, Rahmat Awany, Nizar Rizky Azyumardi, Muhammad Maliki Basundari, Ananda Putri Indira Davianti, Ajeng Faradilla Putri De Putri Permata Rahmadani Dewi K. Soedarsono Dhina, Meiry Akmara Diah Agung Esfandari Duden Saepuzaman, Duden Dudi Darmawan Dudi Darmawan Dwita, Ni Kadek Noviza Trisna Edy Wibowo Elsi Purbowati Farizi, Mohammad Rakha Fasha, Muhammad Aderaka Firdiansyah, Muhammad Fajar Ghassani, Deika Saffanah Nisyyah Goa, Angrisela Azi Hafiduddin, Fata Hanifa, Firda Rizki Nur Helvantriyudo, Whibatsu Herman, Dhea Dearly Imam Maulana Taufan Indah Wardati Indra Perdana Putra Sutejo Indra Perdana Putra Sutejo Irawan, Muhammad Naufal Nur Ismudiati Puri Handayani Kadi, Aufaryafi Baskara M.Yanis, Naili Ikrimah Mahardika Hanif Briantono Mamat Rokhmat Mardiawan, Jihab Tri Mohammad Rakha Farizi Mona Zevika Muhamad Ramdlan Kirom Muhammad Azriel Muhammad Iqbal Musfar, Syafrialdi Mutma’innah, Febria Citra Nafliyah, Sururun Natasya Nurul Putri Nigo Wisnu Wijaya Nima Adlini Nima Adlini, Mutia Anadela Rional, Brian Adianto Fernanda Novian Denny Nugraha Nur Irawan, Muhammad Naufal Nurkhaliz, Muh Nyoman Bogi Aditya Karna Octaviani, Yeni Periyadi, Periyadi Prasojoe, Rahmat Ramadan Qualita Imani Pradharona Rahmat Awaludin Salam Ramadhan, Muhammad Rizqi Syah Ramdan, M. Rafi rana, nendang haura tri rana ahadist Rendy Munadi Retno Hendriyanti Reza Fauzi Iskandar Riksa Belasunda Risfianda, Muhammad Risqi Sawaludin, Kartama Aji Shihab, Kusvihawan Muhammad Sinulingga, Elyzabeth Krean Berg Siti Nur’aini Azizah Sri Astuti Suratin, Daffa Radytio Farrel Sussi Sutisna Sutisna Suwandi Suwandi Suwandi Suwandi Suwandi Suyatna, Sefani Fitria Taryono Taryono Tri Ayodha Ajiwiguna Uke Kurniawan Ulya, Naily Ventiano Ventiano Virginia Rosaline Yanis, Naili Ikrimah M. Zakwandi, Rizki